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What to do about a pea-sized lump on my cat's back? Vet or wait?

Updated on September 23rd, 2025

Pet's info: Cat | Siamese | Female | spayed | 5 years and 5 months old | 10 lbs

I felt a pea sized lump on my cats back below her left shoulder. I cannot see it to take a photo because her hair is so thick but I’m worried. I’m not sure what it is and I don’t know if I should take her to the vet to get it looked at. She doesn’t seem to act up if I press down on the lump. She’s exhibiting normal behavior; drinking, eating and playing. Should I take her to the vet to get it looked at or just keep an eye on it for the time being?

1 Answer

Most Helpful Answer

Dr. Leigh, DVM

Answered By Dr. Leigh, DVM

Veterinarian

Published on March 5th, 2022

If she is otherwise acting normal, then you could monitor it for a little bit and see if it goes away. If the lump persists, then she should be examined by your vet to determine the cause. Your vet can do a fine needle aspirate and cytology to help diagnose the type of mass. If the cells look concerning, then your vet may recommend removal with biopsy.
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