Based on the history you provided, below are the possible causes for your dog’s skin issues. Please click on the links for more information on these diseases. If you still seek further information, please refer to our Ask the vet page to ask a veterinarian 24/7.
Tank, bully breed, seven years old… Has red spots under his armpits and on belly that look kind of like pimples.
They seem to be worse when he is hot. He does scratch, but not visually excessively. However, when the red pimples diminish, I can see scratch marks on his belly.
He is an indoor dog for the most part, and spends most of his time on a 1-1/2″
shag carpet while I’m at work all day.
There is no excessive hair loss. He does however nibble on his toes.