How are acne marks produced? Because the hair follicle mouth of facial skin is blocked, the sebum secreted is not discharged smoothly, bacterial infection leads to subcutaneous blood vessel dilatation, epidermis and dermis damage, leading to skin inflammation and pigmentation. When the acne was eliminated, the blood vessels, dermis and epidermis had not recovered immediately, so a dark red mark was left on the skin, which is what we said. Meng Sujian, Department of Dermatology, Zaozhuang Hospital, Zaozhuang Mining Group, see the original >>