A black bump on the edge of a dog’s eyelid may be a sebaceous cyst. Sebaceous cysts are caused by excessive sebaceous gland secretions that block pores. These cysts are usually benign, but can cause discomfort or infection. It could also be melanoma, a tumor that is usually black and may gradually grow in size. Although most melanomas are benign, they can become malignant.

If a dog owner is concerned about black pimples, it is best to take the dog to the veterinarian for examination. A veterinarian can evaluate the pimple, determine its nature, and provide appropriate treatment recommendations. Treatment depends on the nature of the black pimple. If it's a sebaceous cyst or a benign melanoma, your veterinarian may recommend surgical removal. If an infection is the cause, your veterinarian will prescribe appropriate antibiotics or antifungal medications for treatment.