Great ideas, thanks Taz2 and CLKD. It is painful. I made a mistake with the timings actually, as I've now remembered finding it painful to walk on the hard floors at home back in winter and although I was exercising a bit, it wasn't enough because of working full-time at home and also doing home school full-time. I bought rugs, cushioned slippers, proper trainers, but it hasn't gone away. It's clearly not linked to the HRT patches at all, I must have subconsciously been ready to blame lack of oestrogen for everything!