[catarleriarly]

I have no idea what's causing it, but here's the symptoms:

Every time I sit down for a while, then try to stand up, I get intense pain starting from my lower back all the way down to my knee cap on my left leg. Same thing happens when I'm standing and attempt to sit down again -- it hurts like crazy when I'm halfway between the sitting/standing position.

Also, if I lie down flat on the ground and try to do a sit-up -- no way. I can get maybe six inches off the ground before I get the same intense pain in my left leg, and sometimes this pain is even worse than when sitting or standing. The thing is, if I'm standing, I can stretch my left leg and bring it all the way flat up against my body without pain...

It takes 1200mg of Ibuprofen to stop the pain completely, and I would need to take that much 2-3 times a day (which I don't do as it's quite an overdose, apparently).