“Traveling around the island had revealed I was being affected by altitude changes. I had noticed on days out from the campsite that I would be fatigued the following day. Altitude testing showed this fatigue reaction would occur whenever I spent time above one thousand feet. The longer I was above one thousand feet, the more fatigued I would be the next day and it would often increase forgetfulness and confusion. Once I started avoiding traveling past several hundred feet in altitude, I was much healthier! I call this sickness “Altitude Hypersensitivity”, as it was previously thought that altitude sickness only occurred above 4,900 feet.”
Book:Magee’s Disease