下垂症

例句：

1. 1. The patient's face was swollen and ptotic due to the infection.
   由于感染，患者的脸部肿胀且下垂。
2. 2. The doctor prescribed medication to treat the patient's ptosis.
   医生给患者开了药来治疗下垂病。
3. 3. Laxity in the neck muscles can lead to ptosis, which can be corrected with surgery.
   颈部肌肉的松弛可能导致下垂病，可以通过手术纠正。