By Dr Duncan Houston
A scab on your cat's nose that keeps returning deserves attention, even if your cat is eating and behaving normally. Squamous cell carcinoma, or SCC, can begin as a small patch of damaged skin before becoming a deeper, destructive sore.
The first question is where the problem starts. Cancer on the outside of the nose needs a different assessment from a tumour growing inside the nasal passages.
Quick Answer
Nasal planum SCC is a skin cancer affecting the exposed, hairless surface of a cat's nose, often associated with sun damage. A persistent, recurring or enlarging nose sore needs a prompt veterinary examination and usually a biopsy. Small, superficial lesions generally offer more treatment options, but outcome depends on the tumour's depth, extent and treatment. Open-mouth breathing, marked breathing effort or heavy bleeding requires emergency care.
What does nasal squamous cell carcinoma mean?
The nasal planum is the nose leather surrounding the nostrils. SCC in this skin can look like a pink patch, crust, shallow ulcer or raised growth. Local invasion is the main concern: the lesion can destroy nearby tissue even before cancer spreads elsewhere. Regional lymph nodes and, less commonly, distant sites can become involved. VCA explains feline skin SCC and its pattern of spread.
Intranasal cancer starts inside the nasal cavity. In cats, lymphoma is the most common nasal tumour; other tumour types also occur. Discharge, repeated nosebleeds, noisy breathing or facial swelling therefore do not identify SCC. They warrant investigation of the nasal passages. An advanced external SCC can also extend inward, so these categories can overlap. Read VCA's explanation of nasal tumours.
Which cats are at higher risk?
Sun-related skin SCC particularly affects poorly pigmented, sparsely haired areas, including a pale nose, ear tips and eyelids. Repeated ultraviolet exposure damages these cells. Coat colour alone cannot rule cancer in or out, and other forms of SCC do not share the same sun association. Cornell describes sun exposure and feline skin SCC.
How quickly should your cat see a vet?
| What you notice | Why it matters | What to do |
|---|---|---|
| A recurring crust or sore that is not healing, with normal eating and breathing | A small lesion can still need a biopsy | Call when you notice it and arrange the next available appointment. Do not wait weeks for it to enlarge |
| Increasing ulceration, repeated bleeding, facial swelling, pain or reduced appetite | The lesion may be progressing or another significant condition may be present | Contact your vet the same day for assessment and triage |
| Open-mouth breathing, obvious breathing effort, collapse or heavy ongoing bleeding | Immediate threat to breathing or circulation | Go to an emergency veterinary service now |
A scab falling off does not prove the underlying problem has resolved. Tell your vet if the same patch repeatedly clears and returns. Cats Protection recommends veterinary checks for non-healing sores and other possible cancer signs.
What else could cause a sore or swollen nose?
A scratch, sunburn or skin infection can resemble an early tumour. A suspicious appearance cannot establish the diagnosis, and an infection can also develop on top of cancer.
One important alternative is cryptococcosis, a fungal infection that can cause nasal discharge, swelling and deep nose wounds. Both indoor and outdoor cats can be affected. Your vet may recommend fungal testing when the examination and history fit. Cornell explains the nasal signs and diagnosis of cryptococcosis.
If signs mainly involve the nasal passages, the investigation also considers inflammation, infection, foreign material, polyps and other cancers. The useful distinction is whether the abnormality is confined to the surface or extends deeper.
How do vets confirm SCC and assess its extent?
Your vet examines the lesion, the rest of the face and mouth, and nearby lymph nodes. Bring a history of when it started, previous treatments and whether there has been sneezing or discharge.
- Biopsy: a tissue sample is examined by a pathologist to identify the disease. A surface swab or photograph cannot reliably exclude cancer. An inconclusive result may need further sampling.
- Local assessment: lesion depth and involvement of the nostril affect treatment planning. CT imaging may be needed when deeper invasion or disease inside the nose is suspected.
- Staging: lymph-node sampling and chest imaging may be recommended to look for spread. Blood and urine tests help assess overall health and treatment suitability; normal results do not exclude a skin tumour.
A small diagnostic biopsy confirms what was sampled. If the tumour is surgically removed, examination of its edges helps assess whether removal was complete. These are different questions. VCA explains what biopsy and histopathology can establish.
What treatment options are available?
Ask whether the aim is durable local control or relief of symptoms, and whether referral would expand the choices. The least extensive-looking procedure is only useful if it treats the tumour's full depth.
Surgery
Surgery removes the tumour with surrounding tissue. Some cats need removal of part or all of the nasal planum, which permanently changes their appearance. Discuss the expected breathing function, wound care and possible complications with the surgeon. Complete removal can provide lasting control, but neither surgery nor clear sampled margins guarantees that cancer will never return.
Radiation therapy
Strontium plesiotherapy places a radiation applicator against a small surface area. Its shallow penetration makes it an option for selected superficial nasal-planum lesions. Deeper disease requires assessment for another approach, which may include external-beam radiation.
Radiation usually involves anaesthesia, sometimes for several sessions. Soreness, skin reactions and effects on nearby structures are possible, and later complications depend on the treatment area and protocol. Ask the specialist about expected benefit, visits and side effects for your cat. VCA describes radiation techniques and their limitations.
Other local treatments
Cryotherapy destroys tissue by freezing and can suit selected small, superficial lesions. Diagnosis should be established before destructive treatment. Specialised options, including photodynamic therapy or treatment injected into a lesion, may be discussed at a referral centre; availability and suitability vary. Cats Protection outlines treatment options for sun-related skin damage and cancer.
Topical treatments for particular superficial or in-situ lesions should not be assumed to treat invasive nasal SCC. Do not apply a human cancer cream or start an anti-inflammatory medicine yourself.
What is the prognosis?
There is no single reliable survival figure for every cat with “nose cancer”. Small, shallow skin lesions and extensive intranasal tumours represent very different problems. The biopsy diagnosis, depth, spread, completeness of treatment and your cat's other health needs all influence the outlook.
Ask your vet what successful treatment would look like, what recurrence might look like and what the next option would be if the first treatment fails. If tumour-directed treatment is unsuitable, pain relief, nutrition and a clear quality-of-life plan still matter. Cats Protection explains individual prognosis and quality-of-life decisions.
When is this an emergency?
Open-mouth breathing or visible effort to breathe in a resting cat needs immediate veterinary care. Do not assume it is simply a blocked nose. Keep handling minimal, place your cat in a carrier and contact the emergency clinic while arranging transport. Do not force food, water or tablets. Cornell explains why breathing difficulty requires urgent assessment.
Heavy or continuing bleeding, collapse or profound weakness also warrants emergency help. Do not pack the nostrils or cover the nose with a tight dressing. VCA's feline emergency guidance covers bleeding and breathing problems.
What should you do next?
- Book the examination. Tell the clinic about recurrence, bleeding, appetite changes or breathing signs so it can prioritise your cat.
- Record useful changes. Take a clear dated photograph without touching the lesion. Note eating, drinking, discharge and comfort while waiting for the appointment.
- Protect the area. Avoid picking crusts, scrubbing, peroxide or unprescribed creams. Ask your vet how to prevent rubbing without interfering with breathing or eating.
- Get a written follow-up plan. After treatment, follow the prescribed wound and medication instructions. Report worsening pain, swelling, discharge, reduced eating or new lesions promptly.
During treatment, track comfortable sleep, grooming, appetite and interest in normal activities. Request help with pain or nutrition early. Cornell's cancer home-care advice discusses comfort and nutritional support.
Common mistakes to avoid
- Waiting for a small non-healing sore to become a lump.
- Assuming a normal appetite rules out early cancer.
- Treating repeated crusting with more cream without reassessing the diagnosis.
- Comparing your cat's outlook with statistics for oral SCC, dogs or a different nasal tumour.
- Stopping follow-up because the treated surface looks healed.
Can you reduce the risk?
Reduce direct sun exposure, especially for cats with pale noses and ears. Provide shaded resting areas and keep vulnerable cats indoors during the strongest sunlight. Move favourite beds out of direct sunny windows or use suitable shade. Check exposed skin regularly.
Ask your vet before using sunscreen, particularly on a damaged nose. Cats may lick products off, and human formulations are not automatically safe. Sun protection reduces further damage but does not treat an existing tumour. Cats Protection provides feline sun-safety advice.
Frequently asked questions
Is every scab on a cat's nose cancer?
No. Injuries and other skin conditions can cause scabs. A lesion that persists, recurs or enlarges needs examination rather than diagnosis from appearance alone.
Can nasal SCC heal on its own?
A temporary change in crusting does not mean confirmed SCC has gone away. Discuss treatment promptly instead of waiting for spontaneous healing.
Can an indoor cat develop nasal SCC?
Yes. Indoor status does not exclude skin cancer. Discuss your cat's sun exposure and any changing lesion with your vet.
Will my cat need its nose removed?
Not every cat does. Surgery, radiation or another local treatment may be considered according to the lesion's depth and extent. Ask the treating team to explain both function and appearance.
How do I know whether treatment is helping?
Your vet assesses the treated site and arranges rechecks. At home, record comfort, eating and any new bleeding, crusting or swelling. A photograph helps document change but cannot confirm that microscopic cancer is absent.
The next decision
A recurring nose sore is a reason to act while the affected area is still small. Establish the diagnosis and extent first, then choose treatment with a clear understanding of likely benefit and your cat's comfort.
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