 [ Symptoms ] what is polyarteritis nodosa pan and how it differ from lupus [ Disease ] if the fever is coming down and other symptoms also are improving then home treatment probably is fine if your child has a virus four days is not very long for it to run its course if your child is fever or other symptoms get worse instead of better or if your child develops new symptoms like vomiting diarrhea loss of appetite then it is time to seek medical attention while you are waiting out this virus make sure your child gets plenty of fluids water is fine and you can also give an electrolyte preparation such as pedialyte for fluid replacement it is crucial not to let your little one get dehydrated wishing you both well