When a white head of acne appears on a nevus, the mole should generally be a relatively large mole. After the mole is larger, it often contains one or more hair follicles, so if chronic inflammation occurs locally at this time, it is very likely that acne whiteheads will appear, and the appearance of acne whiteheads in this area is actually consistent with common acne. The first thing that patients need to do is to avoid squeezing, because squeezing acne itself may cause the appearance of secondary infection, and it may also stimulate the mole itself at the same time, which is not a good phenomenon. Patients can apply topical ointment such as vincristine or benzoyl peroxide gel. For whiteheads, the application of one of these two drugs is generally effective in relieving them, and they can usually fade away slowly after about a week of applying these drugs.