pachylosis

例句：

1. 1.This condition is characterized by the presence of blackheads on the face.
   这种状况的特征是脸上出现黑头。
2. 2. The patient was diagnosed with pachylosis and required treatment.
   患者被诊断出患有黑头病，需要治疗。
3. 3. Blackheads can be treated with topical creams or cleansers.
   黑头可以通过局部药膏或清洁剂进行治疗。