(1) I fell pain in right leg below the patella tibia bone. During normal walking pain is not there but while shift my whole weight on my right then I feel pain. What could be the possible reason? Do I have to worry? (2) also during bending of right leg patella pops every time and while squatting also it pops while bending, what is the reason, is it due to tightness of muscle or other thing? Thank you.