I am a 50-year-old woman, married and child-free. I am 5 6 and weigh 68 kilos. My general health is fairly good, but for about a year now, my left knee gets locked when I am about to get up from bed in the morning. The duration of the locking has progressively increased - from 5 minutes to close to two hours, when it last happened some four-five months ago. Ever since I have started to tie my foot to the cot, lest I bend my knee in my sleep and suffer from the pain. But, I don t want it to be a permanent feature of my life; I want the problem to be treated.