ulcer of lower limb

例句：

1. 1.溃疡，2. 疮口，3.溃疡病例句：1.He had a stomach ulcer that required surgery.
   他有一个需要手术的胃溃疡。
2. 2. The patient'scondition worsened after the ulcerwas treated.
   患者的病情在治疗溃疡后恶化了。
3. 3. Ulcers can be causedby stress, poor diet, or infection.
   溃疡可以由压力、不良饮食或感染引起。