皮疽病

例句：

1. 1.He developed a rash on his legs, which turned out to be pityriasis rubra.
   他腿上起了皮疹，原来是皮疽病。
2. 2.The doctor diagnosed him with pityriasis rubra and prescribed antibiotics.
   医生诊断他患有皮疽病，并开了抗生素。
3. 3. Pityriasis rubra is a common skin condition that can be treated with topical creams.
   皮疽病是一种常见的皮肤病，可以通过外用药膏治疗。