For more severe cases doctors may prescribe antibiotics to curb bacterial growth or large doses of vitamin A derivatives such as Accutane which unplug zits and can help prevent scarring.

• 对于病情严重的患者，医生也可以使用抗生素来抑制细菌生长，或者用大剂量的维生素A衍生物，像Accutane来去除丘疹，并防止在皮肤上留下疤痕。