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My cat has a strange, growing spot on its head. Is it contagious?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | 4 months and 26 days old

Hello! I have noticed sth weird on my cat’s head “almost 5 months” “I’ve attached two photos” -> The first one is showing this weird thing when it was very early but the second photo has taken today It’s becoming bigger And we think it is communicable because there’s another cat having this If anybody can help me with this, I will be very thankful

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on January 19th, 2018

There are a number of skin problems that young cats can have that can look like that. Some are contagious to other cats and some are not. Unfortunately, there isn't any way to know by just looking at the skin. You veterinarian can take some samples to look under the microscope for a fungal infection, parasitic infection (such as mites) or bacterial or yeast infection. Any of them can cause the hair loss and crusting that you are seeing with Felix, but all are treated differently, so you will need to have your veterinarian examine Felix to determine the best treatment. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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