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Knee Pain Causes and Their Symptoms

Injuries, caused by sports, overuse, or accidents, can affect different parts of the knee, leading to pain and various symptoms depending on which area of the knee is affected.
ACL Injury
An ACL injury occurs when you tear your anterior cruciate ligament (ACL), which is one of the four ligaments that connect your shinbone to your thighbone. It’s a common injury among people who play sports like basketball and soccer, which require sudden changes in direction. You may hear a loud pop or feel a popping sensation in your knee, along with pain, swelling, buckling, and loss of range of motion.
Sprains
Torn Cartilage
Torn cartilage, which can occur with injuries of the knee or with osteoarthritis, is another common cause of knee pain. Trauma (or generalized wear and tear) to the knee can tear the menisci, which are cushioning pads of connective tissue that also absorb shock located within the knee joint.
Fractures
Knee Bursitis
Tendonitis
Symptoms of tendonitis typically include range of motion pain, local tenderness, and pain-related weakness of the knee.