There are several things that these lumps may be. Dogs can get chin acne so these may in fact be pimples. Infections at the base of the hair follicle or superficial skin infections are possible. These lumps may also be papillomas--warts; these occur in young animals, they are benign and will go away on their own. Another benign tumor of young dogs are called histiocytomas--these appear as red, raised, sometimes ulcerated, and will also regress on its own. There are also cancerous masses that can develop in dogs--boxers are prone to mast cell tumors and these also are red, raised, dermal masses. Your dog needs to be examined by a veterinarian to identify these lumps.
