The acne on the face turns into purple bruise, considering that the infection is aggravated or the subcutaneous blood vessel rupture bleeding, in the treatment mainly includes anti-infective drug treatment and incision to drain the bruise treatment and so on. 1. Exacerbation of infection. Acne is an infectious skin disease, under the stimulation of some adverse factors, the symptoms of infection will be further aggravated, and may even induce systemic symptoms, in the treatment of anti-infective drugs, such as topical erythromycin ointment, oral erythromycin capsules and so on. 2. subcutaneous blood vessel rupture bleeding. Local trauma, extrusion and other factors, can lead to subcutaneous blood vessel rupture bleeding, blood is not discharged from the body will be stagnant in the subcutaneous and the formation of purple bruises, in the effective anti-infective based on timely incision and discharge of bruises to help the recovery of the disease, anti-infective treatment is generally oral-based, such as oral amoxicillin capsules. On the basis of anti-infection treatment, must pay attention to strengthen the skin care, recommend timely medical treatment and must strictly follow the doctor’s instructions.