Stomachache
noun
When your stomach hurts you have yourself a little stomachache. Try keeping your stomach warmer next time.
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.
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.