ecthyma gangraenosum

例句：

1. 1. The patient had a carbuncle on his neck that required antibiotic treatment.
   患者脖子上有一个疖子，需要抗生素治疗。
2. 2.After the surgery, he had to keep the area clean and dry to prevent infection.
   手术后，他必须保持该区域清洁干燥以防止感染。
3. 3. The doctor advised him to avoid touching the carbuncle with his bare hands as it could spread the infection.
   医生建议他避免用裸手触摸疖子，因为它可能会传播感染。