Sounds like she is having an allergic reaction to something she ate or came in contact with,. My daughter had the same thing and we found out she was allergic to the detergent we were using
My Daughter Has Broke Out All Over Her Body With A Red Itchy Rash With Bumps And The Dr Has No Idea What It Is Can You Give Me A Solution Or Maybe An Idea Of What It May Be?
I would take her to a different doctor. Maybe a dermatologist would be better suited to diagnose the problem.