noun
stomach cramps; stomach spasm; gastrospasm
Medical and everyday term for painful, involuntary contractions of the stomach muscles.
急に胃痙攣が起きて、しばらく動けなかった。
I suddenly got stomach cramps and couldn't move for a while.
胃けいれんの痛みで夜中に目が覚めた。
I woke up in the middle of the night with stomach spasm pain.
Compound of 胃 (stomach) and 痙攣 (spasm, convulsion). The reading いけいれん follows standard on'yomi for both kanji.