Acne on the beard can be considered to be beard sores; beard sores are a kind of purulent folliculitis and perifolliculitis caused by Staphylococcus aureus, mostly occurring in the male beard area, and most often manifested as follicular pustules, dry scabs, and flaking. Beard sores belong to bacterial infectious skin diseases, the common cause is Staphylococcus aureus infection, but also occasionally see other bacteria. In addition, men between the ages of 20 and 40, patients with seborrheic dermatitis, those who work indoors for long hours, those who are overworked, those who are chronically stressed or have mood swings, and those who have skin damage caused by shaving are more prone to developing beard sores. Patients are advised to keep the skin around the lips clean and dry, and avoid excessive stress and fatigue; serious patients need to consult a doctor in time to avoid delaying their condition.