Could be something from a tick. Tick diseases are epidemic across the United States and doctors are still in the dark. No good testing for tick illnesses. Igenex lab in California is the best lab for tick disease testing.
Here is an article about a tick illness called ehrlichiosis which causes rash all over the body
http://m.digitaljournal.com/pr/2252517
Other tick diseases cause rash, too. Might be a good place to do some research.
Oh my, that is frightening. It amazes me how often doctors fail to make a correct diagnosis. I know they are only human, but wow.
Our grandson seesm to be on the mend now. Fever gone, rash almost gone. Thanks for your reply.