The white tip of the acne is usually a bacterial infection after the appearance of septic-like changes, the specific cause can be judged according to the prevalent population, the onset of the site and morphology, it is recommended that patients promptly seek medical examination, targeted treatment. 1, whitehead acne: closed acne, belong to mild acne. It occurs in young men and women between the ages of 15 and 30, with lesions on the cheeks and forehead, mostly distributed in dense patches, often accompanied by enlarged pores and seborrhea. The lesions start as conical papules in line with the hair follicles, and can form inflammatory papules with small pustules at the top after secondary infection. 2. Folliculitis: Mostly purulent inflammation of the hair follicles caused by bacterial infections such as Staphylococcus aureus. This is a very common occurrence in people who do not pay attention to personal hygiene and have a strong secretion of sebaceous glands. It occurs on the head and face, neck, buttocks and vulva. The lesion starts as a red follicular papule, and within a few days a pustule appears in the center with a red halo around it. 3. Boils: Acute purulent inflammation of deep hair follicles and surrounding tissues. It occurs in the same population as folliculitis. It occurs on the head, face, neck, and buttocks. The lesion starts as a follicular inflammatory papule, after which the inflammation expands to the surrounding area and forms a hard textured nodule, which becomes soft in the center after a few days, with a fluctuating sensation and a yellowish-white pus-like plug on top.