1. From sport or receives an impact, the severe sprain or tendon tear.2. Degenerative knee joint and use. There are additional factors cause symptoms is fall hike to stand or walk too much weight, mainly found in a middle-aged woman.3 injury of cartilage in the knee. Due to the impact strength while being bent knees have pain, swelling immediately cannot stretch - bending the knee.4. The tibia. Often occur in adolescents with growth of the knee bone unusually fast.5. The patella dislocation is often caused by the accident. The patella ligament rupture.6. The degeneration of the cartilage of awareness. Due to exert the knee in the activity too. To make the skin touch a cartilage degeneration.7. Osteoarthritis of the knee arthritis caused after such as gout.
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