The patellar tendon connects the kneecap to the shin bone and is essential for straightening the knee. Injuries range from tendinitis ("jumper's knee") to partial or complete tears.
Tendinitis develops from repetitive jumping or running activity. Tears usually occur from a sudden, forceful contraction of the thigh muscle — such as landing awkwardly from a jump — and are more common in patients with pre-existing tendon degeneration.
Pain at the bottom of the kneecap, worse with jumping, running, or stairs (tendinitis); a complete tear causes sudden pain, an inability to straighten the knee or bear weight, and often a palpable gap above the kneecap.
Tendinitis usually responds to activity modification, physical therapy, and eccentric strengthening exercises. A complete tear does not heal on its own and requires surgical repair to restore the ability to straighten the knee.
Think you might have this condition? An accurate diagnosis starts with an exam — schedule a consultation with Dr. Thomson.
Schedule a ConsultThis page is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Every injury is different — always consult Dr. Thomson or another qualified physician for a personalized evaluation.