he was diagnosed with scarlet fever last Friday and was given amaxicilian everything was good then yesterday he had extremely bad diarrhea and then this morning broke out in really bad hives mother in law took him to the one ER they just said it was a reaction didn't give him anything he has a fever and rash is getting worse @meplusmytwo

and take him to a children's hospital because regular er aren't equipped enough to treat infants

What's wrong with him