This is another joke translated into English.

A student went to see a doctor. After the examination, the doctor said, "Don't worry (no problem), you just need an injection." The doctor wiped the student's arm with cotton. Suddenly, the doctor looked at the cotton close to his eyes and then wiped the student's arm again. This happened three or four times. Thinking that he was seriously ill, the student asked the doctor anxiously, "Doctor, am I really seriously ill?"? ) "The doctor replied seriously," Student, it's time for you to take a bath. ...