Swelling (edema) caused by fluid accumulation in a part of the body, often occurring in the feet or face.
妊娠中は足のむくみが起きやすい。
Leg swelling is common during pregnancy.
昨晩塩分をとりすぎて、今朝顔がむくんでいた。
I ate too much salt last night, and my face was swollen this morning.
医師は検査の結果、むくみは腎臓の問題が原因だと説明した。
The doctor explained that the swelling was caused by a kidney problem based on the tests.