One frustration of aging, for a logical type like me, is the loss of causality and correlation. In younger years, when I missed sleep or had a bad mood or various aches and pains, I knew what caused it. Fixing the cause fixed the problem, pretty consistently. If the cause was external (job situation, dentist appt, etc), the problem went away after the external stressor went away.
Now I try the same fixes, and try to find the immediate cause, and none of it works. The problem goes away whether I fix or not, and later comes back whether I’ve done the “bad cause” or not.
Season change is the only good correlation. Most of this crap happens in spring and fall, then settles down in solid summer and winter.
Polistra's Mill 