痤疮是一种青春期常见的毛囊皮脂腺的慢性炎症性疾病，其特点为粉刺、丘疹、脓疱、炎性结节、浅表脓性囊肿及深部炎症。

Acne is a common pubertal diseases of pilosebaceous chronic inflammation, characterized by acne, papule, agria, inflammatory nodus, superficial purulent cyst and deep inflammation.

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以炎性结节和囊肿的出现为特征，伴随有粉刺、丘疹和脓疱或颜面部总皮损计数大于125个。

Severe acne is characterized primarily with the presence of inflammatory nodules and cysts. Also present are comedones, papules, and pustules or total lesion count of greater than 125 on the face.

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