swelling of the pattern

例句：

1. 1.The patient's leg was swollen and painful.
   病人的腿肿且疼。
2. 2. The swelling subsided after a few days.
   几天后，肿胀消退了。
3. 3.The doctor prescribed medication to treat the swelling.
   医生开了药来治疗肿胀。