Food poisoning; illness (stomachache, vomiting, diarrhea) caused by eating contaminated food. Colloquially used for milder cases; overlaps with the medical term 'foodborne illness'.
昨夜の刺身がまずかったのか、今朝ひどい食あたりでトイレから出られなかった。
Maybe last night's sashimi was bad—I had terrible food poisoning this morning and couldn't leave the bathroom.
食あたりの疑いがあるので、整腸剤を飲んで様子を見ています。
Suspecting food poisoning, I'm taking digestive medicine and watching how it goes.
夏場は食あたりに注意して、保存方法や賞味期限をよく確認しよう。
In summer be careful about food poisoning—check storage and expiration dates carefully.