I have developed allergies that cause sinus congestion and migraine headaches. I seem to be allergic to being outdoors for very short periods of time, both in our Ft. Myers winter home and in our home in Canada, which is 20 miles away from any city or manufacturing facilities that would produce chemical pollution. Being outdoors this summer for even a half hour per day has caused me to have sinus infections, which triggers very painful migraine headaches that keep me from living a normal life with decent sleep