Acutally,the doctor say"na li bu shufu"means "ni shen ti na li bu shufu","shen ti"means "body" in English. Here the doctor ellipsis the word "shen ti "off,just to impress the sentence more clearly,
In Chinese,we often say "ni zen me le",that means "what's wrong with u"and "what's the matter with u",also means"What`s up with you"or"What`s bothering you"or"Are you sick",the meaning decided by the situation when happened.