Verruca that wouldn't go away & started getting actively painful when I put weight on it. According to my GP, the *red-hot iron wire* is the "conservative" treatment for this. (It was fascinating; there was *smoke* coming out of my foot! I did get a local first :) ). So anyway, it hurts more now but hopefully this is a temporary situation!

I shall bear the sit-starts-only advice in mind if it's not sufficiently better by next week to soldier on through -- thanks!