erythema induratum

例句：

1. 1. The patient had an erythema induratum on his leg that was painful to the touch.
   病人腿上有一个红色的硬结，触摸时很痛。
2. 2.The doctor found a erythema induratum on her arm and treated it with antibiotics.
   医生在她的手臂上发现了一个红色的硬结，并用抗生素治疗了它。
3. 3. The patient's erythema induratum gradually faded as she received treatment.
   随着治疗的进行，患者的红色硬结逐渐消退。