When a dog has folliculitis, black granular substances will appear on the skin, especially on the dog's tail and the external genitalia of male dogs. At this time, the owner needs to perform anti-inflammatory treatment on the folliculitis area, and then wear an Elizabethan ring on the dog.

Dogs will also have the above symptoms after being infected with external parasites. It is recommended to carry out external deworming treatment in time. It may also be blackheads. Dogs also have skin diseases and blackheads. In this case, you can bathe with medicated shampoo to prevent the dog from aggravating the skin disease.