edema during menstruation

例句：

1. 1. The patient developed edema in his legs after the surgery.
   手术后，病人的腿部出现了水肿。
2. 2. Edema is a common symptom of heart failure.
   水肿是心脏病发作的一个常见症状。
3. 3. During the rainy season, people often experience edema due to increased water retention.
   雨季时，人们由于水分滞留而常常出现水肿。