My knees have a tough life – I crawl about on them a lot, fall down on them often, and only very occasionally moisturise them. Given this ill treatment it’s surprising how rarely they complain.

Until today! This morning I was acutely aware of a big bruise on my right knee. Even with my kneepads on it’s very painful when it comes to crawling. Each time I put pressure on it, it’s immediately very sore, and because knees have a small surface area you can’t redistribute your weight like you might with a foot.

I keep getting out of my wheelchair in a rush, and then screeching as the pain kicks in. I’m making an even stranger collection of noises and facial grimaces than usual.

I’ll need to be kinder to my knees from now on.