Hi, I have read you question and understand your concerns. Answer: Would you be able to provide some more information about the rash like; does it come when you do certain things such as going out for a walk or exercise, cleaning the house, eating certain food or drinks or medications, come in contact with an objects (animals, cloths). Do you have history of allergy, dermatitis or asthma. Anyone from your blood relatives having such conditions. Do you sneeze, cough or get short of breath??? Is the rash itchy, bumpy??? Your condition could be a hypersensitivity reaction to an irritant or a trigger. I would recommend that you go to doctor who will examine the rash and run tests to look for/rule out hypersensitivity and then treat you accordingly. Hope this helps.