Anyone suffered? Started about 7 weeks ago and it could have been caused by one of several things, all of which all happened within a couple of days.
Sudden slight pain in lower back when doing a heavy barbell squat (but I've had these before and always recovered in a day or two)
Lugging a lumpy soft bike bag with other stuff in it (so about 22Kg) awkwardly over one shoulder from Tenerife airport for several hundred yards trying to find my taxi
Not checking the seatpost height after rebuilding the bike in Tenerife and doing the first two 2k climbs with the saddle 2" too low
For the first few days it was a constant pain in my left hip and leg, so bad I could barely walk, although still able to cycle (whether I should have or not is another question but I'd gone on a cycle training break so didn't want to stop).
It's gradually eased off but still there. A physio who seems to know his stuff said he thought piriformis syndrome most likely but impossible to say without scans whether it was that or lower back-induced sciatica as the symptoms are very similar.
I've had to stop running & cycle training completely so that's all this years events wiped out. That's bearable as long as there's hope for some kind of recovery eventually.