I met with a small accident on my bike 04 years ago, my left left twisted outwards below the knee. I took treatment from local doctor, xray were normal, slowly I recovered and now I can walk and play, but one thing is happening to me regularly that my lower part below knee slides, to left or right I can not tell, but after that it starts paining and after resting for two to three days it becomes normal, but for those two to three days I wrap my knee with crape bandage tightly. On regular intervals it happens, some times when I am on staircase for going down. And some times it slides if I jump.