My older cat (8 years) has a pinkish-red slight bump under his right arm, right side of chest. He does lick and clean himself alot. It is not sore to the touch. I just discoverd it so I am not really sure how long it has been there. He does also suffer from Feline Acne. Could this be related? Could it be a form of skin cancer? I am really worried!
Your pet needs to be seen by a vet for a diagnosis. I can not tell you what the lump is without an exam. Sometimes a biopsy needs to be performed. vetcare