This afternoon, I noticed that one of my two-year-old cats has a small, skin-colored lump at the base of his ear. He is acting perfectly fine, and didn't seem bothered when I touched it lightly, but I'm worried that it could be something serious.
If you can afford it, I would get the vet to check it out. My cat had a tumor on his head since he was a kitten. The vets told me it was probably benign and not to worry about it, but recently had it cut out and they said it was a slow growing malignant tumor. They think they got it all, thank goodness.