stomachache

He complained of a stomachache after eating at the street stall.他在街头小吃摊吃完东西后抱怨胃痛。

Children often complain of stomachaches before school when they are feeling anxious about the day ahead.孩子们在上学前如果对即将到来的一天感到焦虑，经常会抱怨肚子痛。