Knee pain is the most common muscle and joint ailment that brings people to the doctor. It affects about 25% of U.S. adults. Knee pain may be the result of an injury, overuse, or medical ...

When knee pain occurs, how do you know ... tube with a camera is inserted into the knee joint through a small incision in the joint; it projects images of the inside of the joint.

and pain on the inside, outside, or back of the knee may indicate torn cartilage. You may be unable to fully extend or bend your knee or your knee joint may catch or lock. It may be difficult to ...