How do patellar tendon rupture and patellar tendinitis differ?

Doctor’s answer

Patellar tendinitis usually causes gradual pain below the kneecap that worsens with jumping and squatting. Patellar tendon rupture often occurs suddenly during takeoff or landing and may make active knee extension or straight-leg raising difficult. Suspected rupture needs prompt assessment.

This content is for education. Diagnosis, treatment, and rehabilitation require an individual assessment by a sports medicine specialist.