Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand..
As per your complain recurring rashes on face can be due to 
Allergic Contact Dermatitis due to 
allergic reaction to some unknown allergen and when you get exposed to it the allergic reaction gets initiated..
The common allergens are Poison ivy, certain skin cosmetics, sun exposure, detergents etc..
You should consult an Allergist and get evaluated and a thorough clinical evaluation can be diagnostic and treatment can be planned accordingly..
He can advise you anti allergics like 
Benadryl or levocetrizine, application of steroid ointment and cool compresses..
Allergic testing like 
Patch test, RAST test etc can b done to rule out the exact cause and avoiding exposure to it and taking an 
Immunotherapy to reduce the severity of the allergy symptoms can help..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.