I've got chondromalacia patellae (apparently!!)), in English that means roughening of the inside of my kneecaps, it can get really painful!
But luckily I've got a fantastic Chiropractor (he got me walking again after my last car accident!), I'll ask him next time I see him if he's got a recommendation for your area!!
The best tip he gave me is to put the ball of my foot against the cupboard door in the kitchen (while I'm waiting for the kettle to boil!) with my heel on the floor, and to lean forward until I can feel it pulling at the back of my leg, not painfully, just pulling slightly, and to repeat it (gently!!) until the kettle boils!
It seems to have worked fantastically for me!!
But I agree with everyone else ... go see your gp, and get a referral to a chiropractor ... they're brilliant!!
Quote ... "You've got OCWD ... Obsessive Compulsive Weeding Disorder!!" Well ... I am a BSc Horticulturist .. what do you expect?!?!