pilonidal sinus

例句：

1. 1. The patient's condition worsened after the surgery, and he was admitted to the hospital for further treatment.
   手术后，患者的病情恶化，被送往医院接受进一步治疗。
2. 2.The doctor advised the patient to avoid spicy food and drink plenty of water to help relieve his symptoms.
   医生建议患者避免食用辛辣食物，并多喝水以缓解症状。
3. 3.Due to the severity of the patient's condition, a surgical procedure was required to remove the pilonidal sinus.
   由于患者病情严重，需要通过手术来切除肛窦。