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Hello, I have awakened with facial headaches from time to time for several years. A year or so after they started, I noticed their similarity to an '"ice cream headache"-except these lasted much longer. They seem to be worst just behind my eyes, and I can help the pain for a little while by diverting my warm breath toward my eyes with my hand or a piece of paper. Before I go any farther, you gotta understand, I wear my blankets to bed. The Heitman PWP sleep set:(everything is slick for moving around in bed) 1. My old insulated GI flying long underwear (a jacket and pants). They are slick and warm and, when teamed with a good pair of boot socks make up the only blanket I need most of the year. 2. A couple of small (about 3'x6') slick blankets which I use from time to time** 3. A slick satin comforter, which I only use in the coldest conditions. I usually spend the night on top of this.** I had known that there was a heat exchange problem at night for PWP (the reason we shouldn't use electric blankets) My setup allows many options to meet my temperature/heat loss needs at night. Snapping/Unsnapping the jacket, covering/covering my feet, or my lower half to my waist, etc.-many options. After thinking about the circumstances under which these headaches occurred, I noticed that they were common upon awakening after a night in which I had been too warmly dressed or blanketed. On those particular nights, not only had I been too warm, but also something had happened so that my primary heat loss surface had been my face and head. Maybe I had not opened the front snaps on my jacket. Perhaps one of my little slick blankets had wrapped around my feet. Or some other reason. From this, I speculate the following: 1. That the chore of dispersing heat from my system had been given to those areas with the most access to the air-- my head and face. 2. That the capacity for them to lose heat had been overwhelmed, leading to 3. Over cooling of the local tissues while overwhelming the capacity of the dilated blood vessels to cool the whole body. 4. Leading to a vascular headache . Has anyone else noticed this? Regards, WHH 55/19 **Made especially for me by my bride.