Thanks razzle & wbahn.

I'll put nuts, 'strobe' lighting, food additives, room temperature, missing meals, and teeth grinding on my list (I don't think I grind my teeth at night).

I've come a long way from the deady drugs I used to have to take (one of them ...can't remember the name ...was related to Opium). Ibuprophen usually helps now. Sometimes I have to cave in to codeine ...fortunately that's not too often anymore. Something I still do often, however, is tie a bandana (or scarf) tightly around my head. It'll never cease to amaze me how well that works to relieve pain. If my pain is super bad, the bandana around my head helps to take the sharp edge off the pain until the medication kicks in.