Mast cell disorder?

03/10/13

I put a picture up showing the hives Dan had. The red line you can see is where he had light clothing against his waist. Our consultant did a scratch test that shows that Dan's body produces too many histamines while trying to defend itself. We could gently run a finger nail over his back and literally write his name! A red line would appear within seconds. We are not sure if this reaction is part of the UV or a mast cell disorder our consultant thinks Dan has.
I am not sure if any other UV sufferers have this too?