If your dog has fleshy pimples that are getting bigger and more numerous, it may be caused by skin allergies. You need to cut off all the hair and apply anti-inflammatory ointment. If the number of pimples on your dog is small and getting bigger, it is usually a symptom of a tumor, so you should send it to the hospital immediately for surgery. Pimples on dogs are caused by parasites and other diseases, and they need to be treated with frequent bathing and ointment.
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What happens when a dog has a pimple?

There are many reasons for the appearance of fleshy bumps on dogs. If it is a young dog, it may be natural fleshy protrusions. If the dog has not been dewormed, the fleshy protrusions may be parasites attached to the body surface. Of course, fleshy protrusions may also be caused by lymphoid tissue hyperplasia, or they may be sarcomas produced by tissue hyperplasia. If the dog is an older dog, then the possibility of skin tumors must be suspected.