Jumper’s knee is a term used to describe an injury to a specific tendon – the tissue cord that connects your shinbone to your kneecap (patella). It’s also known as patellar tendonitis. It usually happens when you suddenly change direction while playing a game or jump.
These sudden and sharp movements can cause injuries (tiny tears) in the tendon and often leads to swelling and weakness of the tendon. This condition causes typical pain below the kneecap that gets worse over time. Other common symptoms of the Jumper’s knee injury include:
- Stiffness of the muscles surrounding the knee
- Weakness of the knee joint
- Trouble straightening and bending your knee