If your dog has blackheads that can be squeezed out, it may be caused by skin disease. It may be folliculitis or parasite feces. You need to go to the hospital for examination and testing. Dogs should be dewormed regularly, try not to take them to the grass, bathe them regularly, and keep them clean. It is best to have a light diet, and do not feed foods that are too high in fat, which can easily cause endocrine disorders, leading to The occurrence of folliculitis.