What is this golf ball sized lump on my cat's belly near his hind leg?
Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Tummy!
Possible causes for a lump are: an abscess, a skin mass, or an internal mass in his belly. If Tummy has lost weight or is having any other change either behaviorally or appetite wise I recommend having him evaluated by your Vet. If the mass and in the skin (not the belly), is soft it is likely an abscess or a cyst.
Sine this is a new finding I recommend having him seen by your Vet to be safe.
I hope this helps and feel free to post a picture if you think that would help us better. Have a great day!
Updated on September 23rd, 2025