Hello everyone! My son has had a fever for four days straight at 38.2.…

Hello everyone! My son has had a fever for four days straight at 38.2. There was no runny nose or cough, just slightly constipated stool than usual. I thought it was toothache, but it's been a week and there's still no toothache. The fever subsided, but now there is a rash. It started on his face and neck, now it's spreading to his back. I started worrying that it could be croup and we went to the hospital, they said it's viral and will go away on its own. My son is very fussy, crying as if something bothers him. Has anyone else experienced such symptoms and what was your diagnosis? Or will this really go away on