Stomachache
noun
When your stomach hurts you have yourself a little stomachache.
Try to remember this isn't for general abdominal pain. 胃痛 is specifically for pain or discomfort in the stomach (the internal organ) — a literal stomachache.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
胃痛がひどくなって入院し、病院で一ヶ月過ごしました。
My stomachache got worse and I was hospitalized, so I spent a month at the hospital.
胃痛によく効く薬をください。
Please give me the medicine that works well for stomachaches.
生魚を食べて激しい胃痛が出た時はすぐに病院へ行ってください！アニサキス症かもしれません。
When you experience severe stomach pain after eating raw fish, please go to the hospital immediately! It could be anisakiasis.
禁煙してから、激しい胃痛も治まっている。
Since I quit smoking my intense stomach aches have also stopped.