Solar Dermatitis in Cats

What is solar dermatitis?

solar_dermatitis_in_cats-1Solar dermatitis is a skin disease caused by exposure to the sun. It occurs mainly in cats with white or pale patches of skin that are non-pigmented areas.

"The most commonly affected areas in the cat are the ears, but the nose and the eyelids are sometimes involved."

The most commonly affected areas in the cat are the ears, but the nose and the eyelids are sometimes involved. In the early stages of solar dermatitis, the skin may look pink and scaly with some hair loss. As the condition progresses, the area becomes crusted and ulcerated. The lesions appear to cause irritation, and the cat may shake its head or scratch at the ears, causing bleeding from the ear margins or tips. Sometimes the condition progresses and a malignant tumor called a squamous cell carcinoma develops at the site.

What can be done to prevent the condition from worsening?

"Sunlight should be avoided."

Sunlight should be avoided. This is best achieved by keeping the cat indoors between the hours of 10:00 am and 4:00 pm on sunny days. If this is not possible or if you live in a house with lots of windows and your cat likes to sun itself in the windows, you should apply sun block on the affected and thinly-haired areas. Unfortunately, many cats will rapidly lick the sunscreen off. Since some products may actually be toxic to cats, never use a human sunscreen preparation without first checking with your veterinarian.

How will I know if my cat has squamous cell carcinoma?

solar_dermatitis_in_cats-2Your veterinarian will recommend taking a tissue biopsy from the affected area if there is any concern that the condition may be progressing to squamous cell carcinoma. Most cats will need sedation or general anesthesia before they will allow your veterinarian to perform this procedure. The biopsy will be sent away to a veterinary histopathologist who will examine it under a microscope to see if malignant cells are present.

For more information, see our other, related handouts on squamous cell carcinoma.

Related Tags

solar, cats, dermatitis, affected, ears, cell, squamous, carcinoma, veterinarian, eyelids, nose, biopsy, avoided, malignant, sunlight, sunscreen, progresses, pink, pale, patches, non-pigmented, white, scaly, disease, loss, exposure, stages, anesthesia, tissue, recommend, progressing, sedation, perform, veterinary, procedure, examine, microscope, cells, information, histopathologist, prevent, head, scratch, bleeding, margins, shake, irritation, crusted, ulcerated, lesions, tips, tumor, apply

Looking to learn more?

We also offer free, instant access to over 1,500 related articles on your pet's health including preventive medicine, common and not so common diseases, and even informative case studies. We encourage you to read any of these popular articles below or search our extensive pet health library.

Most Popular Articles

About our approach to exceptional pet health care

At VCA Animal Hospitals, our veterinarians take you and your pet's health seriously. With over 600 hospitals and 1,800 fully qualified, dedicated and compassionate veterinarians, we strive to give your pet the very best in medical care. We understand your pet is an extension of you, and appreciate the opportunity to share in providing exceptional pet care and quality of life.

* Free initial health exam for new clients only. Not to be combined with any other offer. Not good toward boarding, grooming, prescription and non-prescription medication, and retail items. Not good toward emergency and/or specialty veterinary services. Coupon good for up to two pets (dogs or cats only) per household. Redeemable only at a general practice VCA Animal Hospital. For pet owners who are aged 18 and older.

If you are a new client, you can get a free first exam* on your first visit.

Free First Exam

Get to know us by visiting one of our neighborhood hospitals.

Locate a Hospital