What's troubling you?
你哪里不舒服?
I have a stomachache. I think I might get food poisoning.
我胃疼。我想我可能食物中毒了。
重点讲解:
What's the matter with you?
What's troubling you?
去医院看病,医生都会问“你哪里不舒服?”一般不用What's the matter with you?因为它更常用于表示“你怎么了?出什么事了?”老外常会说:What's troubling you? trouble作动词,表示“使烦恼;折磨”。