I awoke this morning with a painful knot in my lower back that has me walking and sitting very carefully so as not to strain anything or make it worse. And the muscles in the back of my right leg and shoulders are sore, I guess from whatever I did at the gym yesterday. And, as is usual these days, my knees are stiff and creaky. These things make me feel prematurely old.
In weird contrast to this, I have a persistent bout of acne on my forehead (see also: late 1980s, teen years, high school).