Last week my DD had a very high fever (normal temp is 97.7 fever was over 104 at times). We went to the hospital to get a few tests and it turned out to be 5ths. Not a big deal, the rash is gone and she is almost back to eating the normal amount. We found a small blister like sore on her groin right between her thigh and body.It seems like it is a little infected now. Has anyone else seen this or heard anything about this happening to little ones? Should I be worried?