My cat has this under its chin and he has fleas, Just wondering if the fleas did this
It's feline acne. Very common. If you use a plastic water or food bowl change it to stainless steel or ceramic. The cat bumping it's chin against a bowl can also cause irritation leading to acne. For that you can use a shallow bowl. You can also treat it with ointment, but it typically goes away once you identify what is causing the irritation.
TAKE
TO
VET
>>2078468
VET. ASAP.