By Dial A Vet Veterinary Team
A tiny pink crust on a white cat's ear tip can be easy to ignore until it becomes a raw ulcer that will not heal. Squamous cell carcinoma and other skin cancers are real problems for cats that live outdoors in harsh sun, which includes large parts of Australia. Catching changes early gives far more treatment options than waiting for a large, painful mass.
Key takeaways
- Pale or white cats, and cats with pink noses or ear tips, carry higher solar skin cancer risk.
- Non-healing sores, crusts or scabs on ears, nose, eyelids or lips need a vet check.
- Biopsy confirms the cancer type and guides surgery, radiation or other plans.
- Indoor time, shade and pet-safe sun strategies reduce risk but do not replace checks.
- Related: skin tags versus cancer, cat skin tags.
Common skin cancers in cats
Squamous cell carcinoma (SCC) is the standout solar-linked cancer on lightly pigmented skin of the ears, nose and eyelids. It starts as redness or a scab and can invade deeper tissue.
Basal cell tumours are often raised, sometimes pigmented lumps. Many are benign or locally aggressive rather than widely metastatic, but they still need sampling.
Mast cell tumours and other less common cancers can appear as nodules anywhere on the body. Cats can also develop lymphoma involving the skin, though that is less typical than intestinal forms.
Not every lump is cancer. Abscesses from fights, eosinophilic plaques, ringworm and allergies create crusts too. That is why guessing from a phone photo is risky.
Australian sun and white cats
UV intensity is high across much of Australia. Cats that sunbathe on brick walls, tin roofs or north-facing windowsills accumulate damage on unprotected pink skin. White cats and cats with white faces are classic patients for ear-tip and nasal planum SCC. Dark fur protects better but does not make a cat immune to every skin cancer.
Signs to watch for
- Persistent crust, scab or ulcer on ear edges, nose or eyelids
- Bleeding when the cat scratches or rubs the face
- Distorted ear tips or missing tissue over time
- Firm lumps under the skin or on the lips
- Swollen lymph nodes under the jaw
- Reluctance to eat if the mouth or nose is painful
- Weight loss or lethargy with advanced disease
When it is an emergency
Seek urgent care for heavy bleeding, facial swelling that affects breathing, sudden inability to eat or drink, severe pain, or a collapsed cat. Expanding facial tumours can become emergencies even when they started as "just a scab."
How vets diagnose skin cancer
Expect a full exam, lymph node checks and often fine-needle aspiration or biopsy. Imaging of the chest or further staging may be advised for some tumour types. Histopathology tells you the exact diagnosis and whether margins are clear after surgery.
Treatment overview
Plans depend on tumour type, size and location:
- Surgical removal with appropriate margins remains central for many SCCs and other masses
- Ear-tip amputation sounds drastic but often cures early solar SCC of the pinna
- Radiation therapy is used in selected referral cases, especially nasal planum disease
- Pain relief, antibiotics for secondary infection and nursing support as needed
- Oncology referral for complex or metastatic disease
Your vet will discuss prognosis honestly. Early, small lesions fare better than deep, advanced tumours. Never use human chemotherapy creams or unproven pastes at home.
Prevention and daily habits
- Provide shade and limit peak UV sunbathing, especially for white cats
- Consider keeping high-risk cats indoors or in secure catios during the harshest hours
- Ask your vet before using any pet-labelled sunscreen on pink skin. Human products can be toxic if licked
- Check ears, nose and eyelids weekly during grooming
- Book promptly for sores that last more than a couple of weeks
FAQ
Can indoor cats get skin cancer?
Yes, though solar risk is lower. Window UV and non-solar tumour types still occur.
Does a scab that keeps returning mean cancer?
Not always, but recurring facial scabs in a pale cat deserve veterinary assessment and often sampling.
Will removing the ear tips hurt my cat's quality of life?
Cats adapt well when surgery removes early disease. Living with a painful ulcer is usually worse.
Are black cats safe from skin cancer?
Lower solar SCC risk on pigmented skin does not mean zero risk of other skin tumours.
Talk with a vet
Worried about a crust on your cat's ear or nose? A Dial A Vet veterinarian can review history and photos and help you decide how quickly to seek local surgery or biopsy. Book a Dial A Vet consult.
References
- Merck Veterinary Manual. Squamous cell carcinoma in cats.
- Australian Veterinary Association. Solar-induced skin disease in cats.
- WSAVA. Oncology resources for companion animal practitioners.
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian. If you are worried about your pet right now, contact your local vet or nearest emergency animal hospital.