Hi, Following threads on here, I thought I would give the magnesium spray a try. I sprayed it on and my son immediately complained that it was burning and stinging - he was got quite upset. 15 mins later and he has a light red rash but the stinging has gone. My initial thought was that this was the tingling that I had read about and that it signified a deficiency but I think this sounds like it might be more of an allergic reaction. Has anyone else had this happen? Not sure if I should try again or call it a day? He has had eczema, a walnut allergy and has sensitivity issues with some foods.