I always knew there was a good reason not to do housework.
I suspect it is a good thing that I now know how to keep this to a day or two of agony, instead of a full week. The trick is taking good anti-inflammatory painkillers (Advil is a good choice for over the counter drugs) and using a heating pad right away. I spent the morning at home doing so and it helped, though I expect to need to keep up Advil for a couple of more days.
Hmmm, I could have sworn my rotator cuffs had a warranty longer than 50 years.