Good Morning - I have suffered from headaches for 1 1/2 yrs. Thinking it was related to a car injury at the time I have had two CT scans, MRI, spine doctors evaluations, ENT doctor evaluation, physical therapy, chiropacty, massage, and blood work. Fortunately, all results are fine, but the headaches continue. I have been grabbing at straws to find an answer. My latest hypothesis is that there is something in my home causing the onset of these headaches. The reason for this theory is that when I leave (ie - visits in another state or community) I am headache free. I also notice that my head is better when I go for walks outside. Is it possible that I am having a reaction of our PROPANE heated house? I have propane detectors hooked up - no alarms going off. My husband is not having this problem. I AM CONFUSED AND DESPARATE! I would appreciate your input. Thank You.