Pain behind knee after my run, is it really serious and should I go to the hospital?

I am the same weight.

I have had knee pain for weeks now, and don't know what the cause of it is or how to fix it. It all started one cold night when I was on a 5ish mile run, these usually aren't a problem for me because I run Cross Country. The only notable thing different...

Ok so my knee has been hurting on and off for a few months now. It started about 3ish months ago with an aching pain but now it really does hurt a lot. When going up or down stairs or squatting and such hurts my knee so much. It's been grinding and poping...

Background info: I'm 23 years old female. I injured my back about 7 or 8 years ago, I got whiplash from a bucking horse. They think I tore muscles and ligaments in my lower back, nothing was broken for the X-rays. I did physical therapy (PT) for it for...

Ok so my knee has been hurting on and off for a few months now. It started about 3ish months ago with an aching pain but now it really does hurt a lot. When going up or down stairs or squatting and such hurts my knee so much. It's been grinding and poping...

I think the pain in my knee has occurred because of my previous job, but I don't know what the problem IS. I could go to a doctor, but I don't just run to the dr. for every little thing. I worked a minimum wage job that required me to be on my knees...

I was playing a pickup game of football, dove for a pass, and landed on my left knee. But it was one of those occasional, awkward, hard landings. Now, a day later, the pain is still the same. I can't walk, go on stairs, etc. The pain is on the inside...

Hi everyone! I've been in track in the 9th grade with no problems at all til this year as our coach was training us- core workout. This whole week we have been running milage only. I was fine for a few days til thursday and friday. Thursday morning,...