Sweet Itch in Horses: Signs, Treatment and Insect Control

By Dr Duncan Houston

A horse that spends spring and summer rubbing out its mane, chewing its belly or destroying its tail may have more than an ordinary fly problem.

Insect bite hypersensitivity is an allergic reaction to proteins in insect saliva. Most horses are bitten without developing severe disease. Susceptible horses develop intense inflammation and itching, then damage their own skin through rubbing, biting and stamping.

The mistake I see most often is beginning serious fly control only after the horse is already raw. Once the itch-scratch cycle is established, reducing insect numbers may not immediately stop the self-trauma. The best results come from preventing bites before the horse begins reacting.

Quick Answer

Insect bite hypersensitivity, commonly called sweet itch, Queensland itch or summer eczema, is an allergic skin disease most often caused by bites from Culicoides midges.

Treatment begins with strict bite prevention using turnout timing, fans, fine screening, full-coverage rugs and correctly applied repellents. Medication may reduce itching and inflammation, but it cannot replace insect avoidance. Breathing difficulty, pale gums, rapid facial or tongue swelling, weakness or collapse should be treated as an emergency.

Insect Bite Hypersensitivity at a Glance

Question	Practical answer
What causes sweet itch?	An allergic reaction to salivary proteins from biting insects, most commonly Culicoides midges
When does it occur?	Usually during warm months, although exposure may continue year-round in suitable climates
Which areas are affected?	Mane, tail, ears, face, back, chest and belly, depending on the insect species
What does it look like?	Broken hairs, hair loss, crusts, thickened skin, open sores and sometimes hives
Is it contagious?	No, but several contagious skin diseases can look similar
What is the main treatment?	Preventing insect bites
Can medication help?	Yes, particularly corticosteroids in severe flares, but treatment must be veterinarian-directed
Do antihistamines always work?	No. Their effect in equine insect bite hypersensitivity is inconsistent
Can it be cured?	There is no consistently reliable cure, and many horses require lifelong seasonal management
When is it urgent?	Severe self-trauma, infection, eye involvement, breathing difficulty, weakness or collapse

Insect bite hypersensitivity is considered the most common allergic skin disease of horses. A validated disease-scoring system published in 2026 reflects how clinically important the condition has become for both welfare monitoring and treatment research. (OUP Academic)

What Is Insect Bite Hypersensitivity?

Insect bite hypersensitivity is an exaggerated immune response to substances injected into the skin while an insect feeds.

In most affected horses, the main trigger is saliva from Culicoides species, tiny biting midges sometimes called no-see-ums or biting gnats. The response is largely IgE-mediated, although several immune pathways contribute to the chronic inflammation and tissue damage.

The condition is known by several names:

• Sweet itch

• Queensland itch

• Summer eczema

• Summer dermatitis

• Culicoides hypersensitivity

• Seasonal recurrent dermatitis

The name varies geographically, but the underlying problem is the same: the horse is reacting to the insect bite rather than merely being irritated by the number of insects present. (Wiley Online Library)

Why Are Some Horses Affected and Others Are Not?

Genetic susceptibility, previous insect exposure, immune regulation and local insect populations all influence whether a horse develops clinical disease.

Some horses tolerate a field full of midges without obvious skin disease. Another horse in the same paddock may develop intense itching after comparatively limited exposure.

The severity of the reaction therefore does not always match the number of insects the owner can see. Midges are tiny, active around particular times of day and may leave the horse before anyone inspects it.

Which Flying Insects Can Cause Skin Reactions?

Culicoides Midges

Culicoides are the most important cause of classic sweet itch.

Different midge species prefer different feeding sites. Some bite along the mane, withers, back and tail head, while others feed along the chest, abdomen, sheath or udder. This is why one horse may rub out its mane while another mainly chews its belly. (Merck Veterinary Manual)

These midges commonly breed in moist or semi-aquatic environments, including:

• Muddy soil

• Pond margins

• Marshy areas

• Wet organic material

• Poorly drained ground

• Stream edges

They are most active during warm weather and commonly feed before and around dusk. Dawn may also be a high-risk period, depending on the local species and climate. (Merck Veterinary Manual)

Black Flies

Black flies may bite around the:

• Ears

• Face

• Neck

• Chest

• Ventral abdomen

Their bites can cause small bloody crusts, painful inflammation and hypersensitivity. Black flies may also contribute to irritation inside or around the ears. (Merck Veterinary Manual)

Stable Flies

Stable flies often feed around the lower legs, flanks and underside of the horse.

Affected horses may:

• Stamp repeatedly

• Kick at the abdomen

• Bite the legs

• Become restless

• Develop small inflamed bite lesions

Stable flies breed in moist, decaying mixtures of hay, feed, straw, urine and manure. Their control therefore depends heavily on removing wet organic breeding material. (Entomology)

Horse Flies and Deer Flies

Horse flies and deer flies produce painful bites and may cause:

• Local swelling

• Bleeding

• Hives

• Defensive kicking or running

• Reduced feeding or concentration

They land only briefly to feed, which can make ordinary residual insecticides less effective than owners expect. Traps may help in selected, manageable areas, but control can be difficult. (Merck Veterinary Manual)

Mosquitoes

Mosquito bites may produce local inflammation, hives or hypersensitivity in susceptible horses.

Mosquito control is also important for preventing vector-borne diseases, but a horse with classic mane and tail destruction is more likely to have Culicoides-associated disease than an isolated mosquito reaction.

Does the Lesion Location Differ Between Horses and Donkeys?

Lesion distribution depends more on the insect species and its preferred feeding site than on a simple horse-versus-donkey rule.

Lower-leg irritation should raise particular concern for stable flies, chorioptic mites and pastern dermatitis. Mane, tail, dorsal midline or ventral abdominal disease fits more closely with common Culicoides feeding patterns. (Merck Veterinary Manual)

What Does Sweet Itch Look Like?

Early Signs

The first changes may be behavioural rather than visibly dermatological.

Watch for:

• Restlessness at particular times of day

• Repeated tail swishing

• Biting at the belly or flanks

• Rubbing the face, mane or tail

• Stamping

• Rolling more frequently

• Reduced concentration during work

• Seeking posts, trees or doors for rubbing

At this stage, the skin may show only small papules, mild redness or broken hairs.

Established Disease

As the horse continues rubbing, you may see:

• Broken mane hairs

• Loss of tail hair

• Patchy alopecia

• Crusts and scabs

• Scaling

• Excoriations

• Thickened skin

• Darkened skin

• Bleeding

• Moist open sores

Chronic inflammation may produce lichenification, where the skin becomes thick, folded and rough. These changes may not completely reverse even when the seasonal flare improves. (Center for Equine Health)

Secondary Infection

Damaged skin allows bacteria and occasionally yeast or fungi to multiply.

Warning signs include:

• Heat

• Pain

• Pus

• Moist discharge

• Strong odour

• Rapidly spreading redness

• Swelling

• Sensitivity to touch

At this point, insect avoidance alone is unlikely to be enough. The infection and the underlying hypersensitivity both require treatment.

Are Hives the Same as Sweet Itch?

Not necessarily.

Insect bites can trigger hives, but generalised urticaria has many possible causes, including:

• Medication

• Vaccination

• Feed or supplements

• Insect bites or stings

• Contact products

• Environmental allergens

• Pressure

• Heat

• Exercise

• Stress

• Sunlight

Hives are raised, soft swellings caused by fluid accumulating within the skin. They may be itchy, but some horses appear comfortable.

Many uncomplicated hives resolve within approximately 12 to 48 hours. However, urticaria can occasionally precede anaphylaxis, so the horse’s breathing, pulse, gum colour and behaviour matter more than the number of bumps. (Merck Veterinary Manual)

When Does Sweet Itch Occur?

Sweet itch is usually seasonal because Culicoides activity increases during warm weather.

The exact season depends on:

• Local climate

• Rainfall

• Humidity

• Temperature

• Nearby water

• Insect species

• Stable and paddock location

In cooler climates, signs may disappear during winter. In warm, humid regions, exposure may continue for much or all of the year.

A horse that remains intensely itchy when local biting insects are inactive should be re-evaluated rather than automatically labelled as having year-round sweet itch. Lice, mites, pinworms, ringworm, bacterial disease and environmental atopic dermatitis become particularly important rule-outs. (Merck Veterinary Manual)

How Worried Should You Be?

Risk level	What it looks like	What it may mean	What to do
Low risk	Mild intermittent rubbing, a few broken hairs, intact skin and normal behaviour	Early or mild insect hypersensitivity	Begin strict insect prevention and monitor daily
Moderate risk	Daily rubbing, visible hair loss, crusts, hives or several affected areas	Active allergic dermatitis requiring a veterinary plan	Arrange an examination within the next few days
High risk	Open sores, bleeding, marked skin thickening, infection, loss of sleep or inability to use tack	Severe inflammation, self-trauma or secondary infection	Seek same-day veterinary assessment
Critical	Breathing difficulty, rapid facial or tongue swelling, pale gums, weak pulse, collapse or seizures	Anaphylaxis or another systemic emergency	Call an emergency equine veterinarian immediately

Uncomplicated sweet itch is rarely immediately life-threatening, but severe disease can create a substantial welfare problem through chronic itching, open wounds and repeated self-trauma. In the most severe cases, long-term management can become extremely difficult. (Center for Equine Health)

What Else Can Look Like an Insect Allergy?

Condition	Important clues
Lice	Generalised winter itching, visible lice or eggs and affected stablemates
Chorioptic mites	Stamping, biting and crusting around feathered lower legs
Pinworms	Tail rubbing with sticky material or irritation around the anus
Ringworm	Circular or irregular scaling and hair loss, potentially contagious
Dermatophilosis	Paintbrush-like crusts, often after prolonged wet weather
Bacterial folliculitis	Raised hairs, pustules, crusts, heat or discharge
Environmental atopic dermatitis	Seasonal or year-round itching not clearly linked to insects
Onchocerciasis	Head, neck or ventral lesions that may overlap with midge exposure
Habronemiasis	Granular, ulcerated summer sores, commonly around wounds or eyes
Contact dermatitis	Lesions beneath rugs, tack, shampoos or topical products
Photosensitisation	Painful, inflamed or crusted areas on unpigmented sun-exposed skin
Sarcoid or squamous cell carcinoma	Persistent, enlarging or ulcerated focal growth

Culicoides can also transmit Onchocerca cervicalis, whose skin-stage larvae may produce a similar but sometimes less intensely itchy dermatitis involving the head, neck and abdomen. (Merck Veterinary Manual)

The diagnosis should be reconsidered when lesions are painful rather than itchy, remain present throughout winter, spread to other horses or fail to respond to genuine insect avoidance.

When Is This an Emergency?

Contact an equine veterinarian immediately if your horse develops:

• Difficulty breathing at rest

• Marked nostril flaring or abdominal breathing effort

• Rapid swelling of the lips, tongue, eyelids or face

• Very pale, grey or blue gums

• Cold limbs

• A weak or difficult-to-feel pulse

• Sudden diarrhoea and drooling after a sting, injection or medication

• Severe weakness

• Collapse

• Seizures

• Minimal responsiveness

• Severe eye swelling or corneal injury

• Uncontrolled bleeding from self-trauma

• Fever, marked pain or rapidly spreading skin infection

Systemic anaphylaxis can develop within seconds to minutes after exposure. It may cause severe cardiovascular or respiratory compromise even when the skin lesions initially appear modest. (Merck Veterinary Manual)

What To Do Right Now

1. Document the Pattern

Take photographs of:

• Mane

• Tail head

• Ears

• Face

• Chest

• Abdomen

• Sheath or udder

• Lower legs

• Every open wound

Record:

• Time of day the horse is worst

• Turnout location

• Weather

• Recent rain

• Insect activity

• Repellent used

• Rug use

• New medication or feed

• Whether other horses are affected

The body distribution and timing often identify which insect-control strategy is most likely to help.

2. Reduce Peak Midge Exposure

Move the horse away from sheltered, damp or poorly drained areas where possible.

Helpful options include:

• Stabling during local peak midge activity

• Using a strong fan in the stable

• Choosing exposed, breezy turnout

• Avoiding marshy or low-lying paddocks

• Moving away from pond edges and stagnant water

• Using fine mesh designed to exclude very small midges

Peak activity is often around dusk and sometimes dawn, but it varies between Culicoides species and regions. Management should follow the local pattern rather than one rigid clock time. (Center for Equine Health)

3. Use Physical Barriers

A sweet-itch rug should provide meaningful coverage of the:

• Mane

• Neck

• Back

• Tail head

• Chest

• Ventral abdomen

Depending on the horse’s pattern, additional protection may include:

• Fly mask

• Ear covers

• Belly panel

• Neck cover

• Fly boots

Check the horse daily for:

• Heat stress

• Pressure points

• Moisture

• Rug rubbing

• Broken straps

• Insects trapped underneath

• Secondary skin infection

A damp or poorly fitting rug can become another source of friction and inflammation.

4. Apply Repellents Correctly

Use an equine-labelled repellent or insecticide suitable for the insects present in your region.

Follow the product label for:

• Application area

• Quantity

• Reapplication interval

• Use beneath rugs

• Eye and mucous membrane precautions

• Competition withdrawal rules

• Use in foals or pregnant mares

Rain, heavy sweating and ultraviolet exposure may shorten the practical duration of some products. Do not assume one morning application will protect a highly allergic horse until the following night.

Natural or essential-oil products should not automatically be assumed safer or more effective. Formulations vary, some irritate damaged skin and evidence for individual products is inconsistent. (Wiley Online Library)

5. Match the Fly-Control Method to the Insect

This is where many otherwise sensible programmes fall over.

Control method	Most useful against	Limitation
Fans and fine screening	Culicoides and other weak flying insects	Requires a well-designed stable and sufficient airflow
Sweet-itch rug and mask	Insects landing directly on the horse	Fit and coverage must match the bite distribution
Repellents	Several adult biting insects	Protection may be temporary and product-dependent
Removing wet spoiled hay and feed	Stable and house fly breeding	Does not eliminate distant midge habitats
Frequent manure and moisture control	House and stable flies	Helpful overall, but not a complete Culicoides strategy
Feed-through larvicides	Flies whose larvae develop in manure	Not a primary treatment for Culicoides sweet itch
Fly predators	Manure-breeding flies targeted by the parasitoids	Should not replace midge-specific control
Horse-fly traps	Larger horse and deer flies in selected areas	Limited effect on Culicoides

Feed-through larvicides work by entering manure and preventing susceptible fly larvae from developing. Culicoides, by contrast, commonly breed in moist soil or aquatic and semi-aquatic habitats. It is therefore reasonable to use feed-through products within a wider stable-fly programme, but they should not be relied upon as the central treatment for sweet itch. This is an inference from the different breeding biology of the insects. (University of Georgia Equine Program)

Manure removal and drainage remain worthwhile because many fly species breed in wet hay, feed, straw and organic waste. They improve the overall insect burden even when the horse also needs separate midge control. (Entomology)

6. Protect Damaged Skin

For mildly damaged skin:

• Prevent further rubbing.

• Keep the area clean and dry.

• Avoid harsh scrubbing.

• Remove caked discharge gently.

• Use only veterinarian-approved topical products.

• Check beneath rugs at least daily.

Open, moist, painful or foul-smelling areas require examination for secondary infection.

Chlorhexidine or another antimicrobial may be appropriate for selected infections, but routine antiseptic use on every itchy lesion can dry or irritate the skin. The product and concentration should match the clinical problem.

7. Arrange Veterinary Treatment Before the Flare Escalates

Veterinary treatment may be needed when:

• Prevention alone is not controlling the itching

• The horse has broken skin

• Hives are widespread

• The horse is unable to rest

• Tack cannot be used comfortably

• Infection is developing

• The diagnosis remains uncertain

Which Medications Are Used?

Corticosteroids

Systemic or topical corticosteroids can suppress severe inflammation and itching.

They may provide rapid relief, but they do not stop the next insect bite. Unless bite exposure is reduced, signs commonly return as the medication is reduced or discontinued.

Corticosteroids require additional caution in horses with:

• Previous laminitis

• Equine metabolic syndrome

• Pituitary pars intermedia dysfunction

• Obesity

• Active infection

• Repeated or prolonged treatment requirements

High doses can induce or exacerbate laminitis and increase susceptibility to infection. Medication selection and tapering should therefore be managed by the attending veterinarian. (Merck Veterinary Manual)

Antihistamines

Antihistamines help some horses, particularly in acute urticaria, but they are often disappointing for established insect bite hypersensitivity.

Limitations include:

• Variable absorption and response

• Large doses in an adult horse

• Sedation

• Frequent administration

• Competition restrictions

• Incomplete control of severe inflammation

UC Davis notes that antihistamines have not been shown to be particularly effective for equine IBH. They should be viewed as a possible adjunct, not as a substitute for preventing bites. (Center for Equine Health)

Antibiotics and Antifungals

These are used when bacterial or fungal infection is diagnosed or strongly suspected.

They do not treat the allergy itself. Repeated antibiotics without adequate insect control simply treat one downstream complication while the horse continues damaging its skin.

Topical Anti-Inflammatory Treatment

Veterinary-prescribed sprays, creams or shampoos may help local inflammation.

Products around the:

• Eyes

• Ears

• Sheath

• Udder

• Open wounds

require particular care. Human hydrocortisone cream and other household products should not be applied without veterinary advice.

How Is Insect Bite Hypersensitivity Diagnosed?

There is no single test that proves every case.

Diagnosis usually combines:

1. A recurring seasonal pattern

2. Typical lesion distribution

3. Intense itching

4. Exposure to relevant biting insects

5. Exclusion of parasites, infection and other skin disease

6. Improvement with effective bite prevention

The veterinarian may perform:

• Close coat and skin examination

• Skin scrapings

• Hair examination

• Cytology

• Fungal culture or PCR

• Bacterial culture

• Perianal tape testing

• Skin biopsy in atypical cases

• A carefully controlled parasite-treatment trial

Clinical history and seasonality remain central to the diagnosis. (Center for Equine Health)

Can Allergy Testing Confirm Sweet Itch?

Not by itself.

Intradermal testing and serum allergen-specific IgE testing may provide supporting information, but:

• Clinically normal horses can test positive.

• Affected horses may test negative.

• The result may not match the horse’s local insect exposure.

• Sensitisation does not always equal clinical disease.

• Different Culicoides species carry different allergens.

Testing is most useful after the diagnosis is already clinically credible and when the veterinarian is considering allergen-specific immunotherapy.

A positive result on an extensive allergy panel should not replace parasite testing, skin cytology or a proper examination of the lesions. (Wiley Online Library)

Can Immunotherapy Help?

Traditional immunotherapy prepared from crude whole-body Culicoides extracts has generally produced inconsistent results.

A newer approach using purified recombinant Culicoides allergens is more promising. In a prospective double-blinded placebo-controlled study involving 17 affected horses, treated horses had a greater reduction in lesion severity during the first treatment year. The difference became more pronounced during the second treatment year, when 89% of treated horses achieved more than 50% improvement compared with 14% of placebo horses. (Frontiers)

These findings are encouraging, but several limitations matter:

• The study was small.

• Treatment continued across two seasons.

• The recombinant protocol is not yet a universal, widely available cure.

• Individual horses may be sensitised to different allergens.

• Physical insect protection remains necessary.

Owners should be cautious when a generic allergy injection is presented as a guaranteed cure for sweet itch.

How Should You Monitor Progress?

A newly validated equine IBH severity score published in 2026 combines the intensity of lesions with the amount of skin affected. The system records changes such as broken hair, alopecia, blood or exudate, scales, crusts, thickening and swelling across defined body areas. (OUP Academic)

Owners do not need to reproduce the full research score, but the same principles can improve home monitoring.

Record once weekly:

Feature	What to record
Itching	Score from 0 to 10
Body distribution	Which areas are affected
Hair damage	Broken hair or complete hair loss
Skin injury	Crusts, blood, discharge or open wounds
Skin thickening	None, mild, moderate or severe
Fly protection	Rug, fan, stabling and repellent used
Weather	Temperature, rain, humidity and wind
Horse behaviour	Rest, feeding, riding tolerance and rubbing

Take photographs from the same angle and distance. A consistent record is far more useful than trying to remember whether the horse looked “about the same” three weeks earlier.

What Is the Prognosis?

Most horses can be kept comfortable when the trigger is recognised early and bite prevention is applied consistently.

However, sweet itch commonly returns each season. Horses with severe hypersensitivity may require:

• Daily environmental management

• Extensive protective clothing

• Repeated medication

• Treatment of secondary infection

• Changes in turnout or location

• Long-term specialist involvement

There is currently no consistently reliable cure. Particularly sensitive horses can develop severe self-trauma and substantial welfare impairment despite intensive management. (Center for Equine Health)

The strongest predictor of a manageable season is often not which cream is purchased after the flare. It is whether the prevention plan was operating before the first significant bites occurred.

Common Mistakes

Treating Every Fly as Though It Has the Same Life Cycle

Midge control, stable-fly control and horse-fly control require different strategies.

Waiting Until the Mane and Tail Are Already Destroyed

Established skin inflammation and self-trauma are much harder to settle than early disease.

Relying Only on Fly Spray

A severely allergic horse usually needs physical barriers, turnout management and fans as well as a repellent.

Expecting Fly Predators or Feed-Through Products To Cure Sweet Itch

These may reduce selected manure-breeding flies but do not target every Culicoides breeding habitat.

Leaving a Wet or Poorly Fitting Rug on the Horse

Heat, moisture and friction can create additional dermatitis and infection.

Assuming Hives Always Mean Insect Allergy

Medication, vaccines, feed, pressure, heat and several immune or skin diseases can produce the same reaction pattern.

Giving Repeated Corticosteroids Without Confirming the Diagnosis

Steroids may conceal mites, ringworm or bacterial infection and carry additional risk in metabolically susceptible horses.

Trusting an Allergy Test Without Matching It to the Clinical Pattern

A laboratory result is only useful when it fits the horse’s lesions, season and genuine environmental exposure.

How Can Future Flares Be Prevented?

Before the Insect Season

1. Review when signs started in previous years.

2. Repair or replace sweet-itch rugs.

3. Service stable fans.

4. Install appropriately fine screening.

5. Improve drainage.

6. Address standing water where practical.

7. Move manure and wet organic material away from horses.

8. Purchase the chosen repellent before insects increase.

9. Photograph the normal mane, tail and skin.

10. Discuss preventive medication for horses with a history of severe disease.

During the Season

1. Inspect the horse every day.

2. Reapply repellents according to the label and exposure.

3. Check beneath rugs.

4. Stable during local peak midge activity.

5. Use fans consistently.

6. Keep wet feed, hay and manure under control.

7. Treat the first skin injury promptly.

8. Escalate veterinary treatment before severe self-trauma begins.

After the Season

Review:

• Which body areas were affected

• Which paddocks were worse

• Which control measures genuinely helped

• How often medication was needed

• Whether the season began earlier than expected

• Whether the horse remained itchy after insects declined

Persistent winter itching should trigger a new diagnostic work-up rather than automatic continuation of the sweet-itch label.

Frequently Asked Questions

Is Sweet Itch Contagious?

No. Sweet itch is an allergic response within the affected horse. It is not spread directly from horse to horse.

However, lice, mites and ringworm can look similar and may spread between horses, so a new itchy horse should still be properly examined.

What Time of Day Are Midges Worst?

Many Culicoides species are most active around dusk, and some are also active around dawn. Warm, humid and sheltered conditions generally increase exposure. Local species and weather patterns matter more than one universal timetable. (Merck Veterinary Manual)

Do Fly Predators or Feed-Through Products Prevent Sweet Itch?

Not reliably. They may help control selected flies whose immature stages develop in manure or decaying stable material. Most classic sweet itch is driven by Culicoides, which commonly breed in moist soil and aquatic or semi-aquatic habitats.

Can a Horse With Sweet Itch Still Be Ridden?

Often, yes, provided the horse is comfortable and tack does not rub affected skin.

Do not ride when the horse has painful open lesions, severe hives, marked agitation, infection or tack interference. Rubbing a girth or saddle over damaged skin will make the problem worse.

Can Sweet Itch Go Away Permanently?

Signs usually improve when insect exposure stops, but the underlying hypersensitivity commonly remains. Most affected horses require seasonal management every year, and some need protection for much of the year in warm climates.

Final Thoughts

Flying insect allergies are manageable, but only when the control programme targets the correct insect.

The most important points are:

1. Culicoides midges cause most classic sweet itch.

2. Lesion location depends on where the responsible insect prefers to feed.

3. Mane and tail damage are common, but the belly, ears, face and chest may also be affected.

4. Hives can accompany insect allergy but have many other causes.

5. Diagnosis requires seasonality, lesion distribution and exclusion of parasites and infection.

6. Preventing bites is more important than any single medication.

7. Fans, fine screening, turnout timing and full-coverage rugs are central management tools.

8. Repellents must be used according to their actual label and duration.

9. Feed-through products and fly predators do not replace midge-specific control.

10. Corticosteroids can control severe inflammation but require veterinary oversight.

11. Antihistamines have inconsistent benefit in established equine IBH.

12. Traditional immunotherapy has been disappointing, although recombinant-allergen research is promising.

13. Open wounds, infection and severe self-trauma need prompt treatment.

14. Breathing difficulty, pale gums, rapid swelling, weakness or collapse is an emergency.

15. The best time to begin a sweet-itch plan is before the horse starts rubbing.

The mistake that causes the greatest harm is trying to soothe the damaged skin while the horse continues receiving bites every evening. Treat the lesions, certainly, but stop the next bite as well.

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ASK A VET™ can help you organise lesion photographs, insect patterns, turnout times, repellents and treatment responses while you work directly with your attending equine veterinarian or veterinary dermatologist. A horse with breathing difficulty, rapidly developing swelling, pale gums, collapse or extensive infected wounds still requires immediate hands-on veterinary care.