Diagnosing the cause of chronic itch isn't easy, but one man wants to change that Enlarge this image toggle caption Warumpha Pojchananaphasiri/Getty Images Warumpha Pojchananaphasiri/Getty Images Ever had an itch you can't scratch? "But most other forms of itch, like atopic dermatitis, eczema, other conditions, they don't actually have a pathway for histamine as the itch mediator," says Kwatra. "When …
