Missing data. To get the most specific information from this site you need to provide adequate background information on the issue followed by your question. Without the kids age, duration of problem, other symptoms, etc. the only response is give the kid some fever meds. Without the kids age the type of med cannot be specified. You are welcome to start over.
Some thoughts... Perhaps you mean a fever (everyone has a temperature, but sometimes we are ill and get a fever or high temperature). For minor illnesses (like a cold), fever and aches go away by themselves. Most people use over-the-counter drugs like Tylenol, Motrin, or Advil for relief of such symptoms. A doctor can evaluate to diagnose, especially if a person has more than minor, temporary fevers.