My daughter has been diagnosed with mast cell syndrome resulting from anorexia most of her teenage years,shes now 20. Shes been recovered for almost 2 years, but is suffering from her skin burning, Iam assuming this is from something to do with histamine. It gets really bad when she has anxiety or is in the sun, she constantly has to spray her face with water to get relief. She takes benedryl, but doesnt help much. any advice on whats going and how to help?