My cat Reno, who is a 10 year old healthy male Siamese, has recently developed dark bumps and clusters on his chin. He's never had this problem before and is a meticulous self-groomer. He eats from ceramic bowls that are cleaned daily. The clusters don't seem to bother him any but it does look pretty unsightly on this otherwise handsome cat. Does Reno have kitty acne? If so, what should I do to eradicate it? Do I need to take him to the vet or can he be treated at home? Do I need to start washing his chin? He's a clean boy who rarely needs a bath, although he does like to occasionally roll in the dirt when he's outside. Any suggestions you all can give will be most appreciated. I'll try to get a picture of Reno's chin later and post it here.