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Updated on September 23rd, 2025
Pet's info: Cat | American Shorthair | Male | neutered | 2 years and 7 months old
My cats had this lump/wound on his head for a little over a week now. The lump is hard and moves around with the skin. The scabs on top occasionally bleed a small amount and leaks clear plasma-like fluid (I think he rubs the scab off). I have never seen him itch it and he doesn’t pull away when I touch it (not painful?) It has not produced any pus like substances. He hasn’t been lethargic and has been eating normally. He is an indoor cat and I have no other pets. What could this knot/wound be?
2 Answers

Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH
Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner
Published on April 30th, 2018
Answered By Lauren Kennedy, DVM
Veterinarian
Published on October 13th, 2017
Based on what you are describing I was initially concerned about a wolf worm as well. These will burrow deep into the tissues and cause a local inflammation and sometimes infection. Typically these need to be removed surgically by a veterinarian.
I would recommend taking your cat in to see you vet. If it is not a wolf worm it may be an abscess or cyst that needs to be addressed.
I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck!
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