Apparently I’ve been suffering from stress.
In my foot.
This explains the pain, which I should have recognised for what it was long before I did, and which was identified this morning, by a doctor, as a probable stress fracture of the fifth metatarsal. It’s more or less mended now, thanks to a very idle weekend. I have returned the crutches: admittedly I would have used them more often had the nurse used the word ‘fracture’ last week. Many years ago, I fractured the fifth on the other foot. Fortunately, this time, I was not plastered. How inconvenient would that have been?