句型What's wrong? I'm ill. — 英语阅读题

Read the short passage and answer the question. Peter didn't come to school today. Miss Fang calls his mother. His mother says, "This morning Peter didn't want to eat breakfast. He says he is ill. Now he is at the doctor's with his father." At the doctor's, the doctor looks at Peter and asks, "What's wrong?" Peter says, "I'm ill. I don't feel well, and I want to sleep." The doctor says, "Don't worry. Take this medicine and have a good rest. You will be fine soon." Question: What does the doctor ask Peter at the doctor's? Answer with a sentence from the passage.