Hard lumps of dark acne on the skin are considered to be related to acne, sebaceous cysts and other diseases, which can be treated with fusidic acid cream and cystectomy under doctor’s supervision. 1. Acne: The phenomenon of dark acne lumps is usually caused by excessive oil secretion and blockage of follicular openings. Acne may also appear as pimples, papules, and plaques, which can be treated with medications such as adapalene gel and fusidic acid cream under doctor’s supervision. 2. Sebaceous cysts: usually due to sebaceous gland excretory duct obstruction, sebaceous gland cystic epithelium gradually increased, which in turn caused the phenomenon of skin dark acne hard lumps. Sebaceous cysts usually appear multiple or single lumps and other symptoms, can be taken under the guidance of the doctor cystectomy and other surgical methods to treat. If the phenomenon of skin dark acne hard lumps, you can go to the hospital for further examination to clarify the cause of the disease, and then timely medical treatment. Pay attention to rest in daily life, keep the skin clean and dry to prevent infection.