Conditions 

Jumper’s Knee

Jumper’s knee, also known as patellar tendonitis, is a condition characterized by inflammation of your patellar tendon. This connects your kneecap (patella) to your shinbone (tibia). The jumper’s knee weakens your tendon, and, if untreated, can lead to tears in your tendon.

Causes

Jumper’s knee is caused by overuse of your knee joint, such as frequent jumping on hard surfaces.

It’s usually a sports-related injury, linked to leg muscle contraction and the force of hitting the ground. This strains your tendon. With repeated stress, your tendon may become inflamed.

Symptoms

Following are the most common symptoms of the jumper’s knee. However, you may experience symptoms differently. Symptoms may include:

• Pain and tenderness around your patellar tendon
• Swelling
• Pain with jumping, running or walking
• Pain when bending or straightening your leg
• Tenderness behind the lower part of your kneecap

The symptoms of the jumper’s knee may look like other conditions or medical problems. Always see your healthcare provider for a diagnosis.

Diagnosis

In addition to a complete medical history and physical exam, your healthcare provider may use an X-ray to help diagnose the jumper’s knee.