What Causes Severe Knee Pain On Right Leg?

why does my knee hurt age 30, 5 6 height, good medical history my knee problem started 5 years ago in my right knee after 30 mile hike. the hike was fine, but the problem i think was last few miles were all big stair steps down a mountain and the whole time i lead with my right leg, so constantly put weight on my right leg going down the stairs. after my right knee hurt really bad for a week where i had to limp and couldn t bend my right leg. ever since then i ve had problems after running or long walks, even wrestling around with friends. recently just resting my knee has started to give me moderate pain, it started recently because i was sitting weird where my knee wasn t bent properly for hours and hours for days... what could be the problem? the pain inside the knee.