Hot Spots on Dogs: Causes, Treatment & How to Stop the Itch 🐶✨

By Dr Duncan Houston

🔎 Quick Answer

Hot spots in dogs are sudden, inflamed, red, moist patches of skin caused by licking, scratching, chewing, or rubbing. They are usually triggered by fleas, allergies, moisture, ear infections, or irritation under collars and harnesses. Treatment involves clipping the area, cleaning it properly, stopping self-trauma, treating infection and inflammation, and fixing the underlying cause so it does not keep coming back.

One day your dog’s skin looks completely normal.

The next, there’s a raw, red, wet patch that seems to have appeared out of nowhere.

That’s a hot spot.

And yes, they can go from tiny irritation to full angry skin disaster very quickly.

🔥 What Is a Hot Spot?

A hot spot is also called acute moist dermatitis.

It is:

• a sudden, inflamed patch of skin

• usually red, wet, painful, and irritated

• often caused by your dog licking, chewing, scratching, or rubbing the area repeatedly

Once that cycle starts, the skin gets more inflamed, which makes the dog more uncomfortable, which makes them lick more.

👉 It becomes a fast-moving itch-pain-lick loop.

📍 Common Locations for Hot Spots

Hot spots can happen almost anywhere, but some areas are more common:

• neck and cheeks

• under the collar

• hips and thighs

• rump and tail base

• chest and belly

• feet and lower legs

The location often gives you a clue about the cause.

🔍 What Causes Hot Spots?

Hot spots are usually not the primary problem.

They are usually the result of something else making the dog itch or feel uncomfortable.

Fleas

One of the most common triggers.

Even one flea bite can cause intense itching in sensitive dogs.

Especially common around:

• tail base

• rump

• back legs

Allergies

Dogs with allergies are hot spot machines if the itch is not controlled.

This can include:

• food allergy

• grass or pollen allergy

• dust or environmental allergy

Moisture

Wet skin is irritated skin.

Hot spots are common after:

• swimming

• bathing

• rain

• trapped moisture under collars or thick coats

Ear Infections

Dogs with sore ears often scratch near the face, cheeks, and neck.

👉 That repeated scratching can quickly create a hot spot.

Insect Bites

Mosquitoes, ants, ticks, and other bites can trigger intense local irritation.

Matted Fur or Friction

Thick coats, matting, and rubbing from poorly fitted gear can all irritate the skin.

Stress or Boredom

Some dogs will obsessively lick or chew when stressed, anxious, or under-stimulated.

⚠️ What a Hot Spot Looks Like

A hot spot usually looks like:

• red, inflamed skin

• wet, shiny, or oozing surface

• hair loss around the area

• crusting or sticky discharge

• pain when touched

• constant licking, chewing, or scratching

👉 They often look worse than people expect, and they can spread fast.

🧠 Why Hot Spots Get Worse So Quickly

This is the nasty part.

A dog licks or scratches because the area is irritated.
That damages the skin surface.
Bacteria and inflammation increase.
The area becomes wetter, itchier, and more painful.
Then the dog licks even more.

👉 That is why a small patch in the morning can look dramatic by the evening.

🩺 How Vets Treat Hot Spots

Treatment is usually straightforward, but it works best when done early.

Your vet may:

• clip the fur around the area

• clean the skin with an antiseptic solution

• dry the area properly

• prescribe topical treatment

• prescribe oral antibiotics if infection is deeper or more severe

• use anti-inflammatory medication to reduce itch and pain

• investigate the underlying cause

Common underlying issues that also need treatment include:

• fleas

• allergies

• ear disease

• skin infections

• friction or moisture problems

👉 Treating the spot without treating the trigger is how you end up seeing the same hot spot again next month.

🧴 What Can Be Used on a Hot Spot?

Depending on the case, vets may use:

• chlorhexidine-based cleansers

• dilute iodine-based antiseptics

• topical steroid products

• topical antibiotics

• oral anti-inflammatory medications

• oral antibiotics in more severe cases

⚠️ Not every red patch needs the same thing.
Some need drying out.
Some need anti-itch medication.
Some need full underlying allergy workups.

🏠 Home Care Tips

If your dog has a mild hot spot or you are waiting to see your vet, home care matters.

1. Stop the licking

This is the big one.

Use:

• e-collar

• soft cone

• recovery suit if suitable for the area

If the dog keeps licking, the hot spot keeps winning.

2. Keep the area clean

Clean gently only with products your vet recommends.

Usually this means:

• antiseptic solution

• gentle pat drying

• no harsh scrubbing

3. Keep it dry

Moisture feeds the problem.

Avoid:

• swimming

• over-bathing

• heavy ointments unless prescribed

4. Watch for worsening

See your vet sooner if you notice:

• spreading redness

• bad smell

• thick discharge

• swelling

• worsening pain

• lethargy

🚫 What Not to Do

Avoid:

• human antiseptic creams without guidance

• thick greasy ointments that trap moisture

• essential oils

• peroxide or alcohol

• letting your dog “just keep licking it”

That last one is the classic disaster move.

🛡️ How to Prevent Future Hot Spots

Prevention depends on preventing the itch or irritation that starts the whole thing.

Stay on top of flea prevention

This is one of the easiest wins.

Dry your dog properly

Especially after:

• swimming

• baths

• wet weather walks

Pay extra attention to dense coats and skin folds.

Manage allergies

If your dog keeps getting hot spots, allergies should be high on the list.

Treat ear problems early

Head and neck hot spots often start with itchy ears.

Keep the coat healthy

Regular brushing and grooming help reduce:

• matting

• trapped moisture

• skin irritation

Reduce stress licking

Give dogs enough:

• exercise

• enrichment

• rest

• routine

A bored dog with itchy skin is a terrible combination.

🐾 Practical Takeaways

• hot spots are usually a symptom, not the root problem

• they can worsen very quickly

• stopping licking is critical

• early treatment is easier and more effective

• fleas, allergies, moisture, and ear disease are major triggers

👉 If your dog suddenly will not leave one patch of skin alone, pay attention.

💬 Final Thoughts

Hot spots are painful, frustrating, and annoyingly good at showing up overnight.

The good news is they are very treatable.

The trick is not just treating the red patch you can see.
It is figuring out why your dog started licking or scratching in the first place.

That is how you stop the cycle instead of just cleaning up the mess after it starts.

❓ FAQ

Can I treat a hot spot at home?
You can start by preventing licking and gently cleaning the area, but many hot spots need veterinary treatment to control infection, pain, and inflammation properly.

Do hot spots go away on their own?
Usually not. Most get worse because the dog keeps licking or scratching them.

Are hot spots contagious?
No. The hot spot itself is not contagious, but underlying causes like fleas can affect other pets.

Should I cover a hot spot?
Usually no. Most hot spots heal better when they are clipped, cleaned, and kept dry and open to air unless your vet advises otherwise.

Can food allergies cause hot spots?
Yes. Food allergies can absolutely contribute to recurring itch and skin inflammation that leads to hot spots.

Why does my dog keep getting hot spots?
Recurring hot spots often point to an underlying issue such as fleas, allergies, ear disease, chronic moisture, grooming problems, or repeated licking behaviour.

If your dog keeps getting skin flare-ups or you are not sure whether it is a hot spot, allergy issue, or infection, the ASK A VET™ app can help you track symptoms, upload photos, and get guidance early before it turns into a bigger mess.