anal fissure

例句：

1. 1.He had an anal fissure that required medical attention.
   他有一个肛门裂口，需要医疗关注。
2. 2. The patient was advised to avoid spicy foods and hard stools to prevent further damage to the anal fissure.
   患者被建议避免辛辣食物和硬便，以防止进一步损害肛门裂口。
3. 3. After several days of rest and treatment, the patient's anal fissure began to heal.
   经过几天的休息和治疗，患者的肛门裂口开始愈合。