Behind-the-knee pain could be due to muscle strain or arthritis—or something far more serious. Orthopedic experts say these ...

Brad: There's a tendon above and a tendon below the knee cap that connects the quadriceps and the patella to the bone. Brad: ...

This pain may be caused by soft cartilage under the kneecap (patella), referred pain from another area such as the back or hip, or soft tissues around the front of the knee. Among soccer players ...