Acne vulgaris and blackheads are both acne, and acne vulgaris includes inflammatory papules and nodules in addition to blackheads. 1. Blackheads are the earliest skin lesions of acne, occurring in areas rich in sebaceous glands, such as the face, forehead, back, etc. They are common in adolescent men and women, and are manifested by the appearance of visible black dots in obviously enlarged pores, which can be squeezed out of the sebaceous plugs. 2. Acne vulgaris is a special type of acne that has been in the process of pimples and inflammatory papules, often manifested as pimples (whiteheads, blackheads), inflammatory papules and nodules on the face, chest and back, without the appearance of typical pustules, which can be accompanied by itching, pain, burning and other symptoms. It is recommended that patients promptly go to the hospital dermatology department, follow the doctor’s instructions for standardized treatment, do not blindly use drugs.