Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
Hello, I noticed my cat had a big lump on his head yesterday night when he came in from outside. It’s right behind his ear and it’s very hard like a knot. He won’t use the litter box and has been laying down all day long and he keeps itching the lump and there is no cuts or scratches on the area
1 Answer

Answered By David Elbeze, DVM, MRCVS
Veterinarian
Published on November 27th, 2017