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My cat has a large, soft lump on his back near his neck. What is it?

Updated On September 23rd, 2025

hi i have malee cat idk breed or age he just came to us recently i noticed a big lump or idk how to say on his back right bellow neck area its size of a egg larger then egg on touch it feel something between sponge or waterballon it recently showed up like day or two it also noticable on eyes when u see cat u see big lump

1 Answer

Most Helpful Answer

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Answered By Dr. Davis

Veterinarian

Published on March 12th, 2018

From your description this sounds like an abscess or pocket of infection. Outdoor cats get these from fighting. You can use a hot compress on the area and massage it. If you find a scab I would remove it so the infection can drain out. If you can take him to a veterinarian they will sedate him and clean the area and give him antibiotics. Once the area has drained you can keep the wounds cleaned with hydrogen peroxide. If you are going to keep him I recommend neutering him so he’s not so prone to fighting. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for your cat.

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