Overuse of the Patellar tendon can lead to Patellar Tendonitis especially in individuals who play sports that require a lot of squatting and jumping movements.

Other causes can be attributed to abnormal alignment of lower limbs like knocked knees or flat feet. Altered postures such as these change the angle between the Quadricep muscle and the Patellar tendon.

Growth spurts can also cause increased tension in the Patellar tendon such that the tendon cannot keep up with the growth of the lower leg. In complications such as this, the tendon becomes too short and causes a pull on the bottom tip of the knee cap. This condition is also known as Sinding-Larsen-Johansson disorder.

Symptoms may include:

- Pain and tenderness directly over the Patellar Tendon, just below the kneecap

- Pain when kneeling

- Swelling

Depending on the severity of the Patellar Tendonitis, treatment may vary with the below:

- Knee strapping to reduce pain

- Non-steroidal anti-inflammatory drugs to reduce swelling

- Physiotherapy to control pain and inflammation

- Resting to control pain and inflammation

- Shoe inserts (orthotics) may be given to support flat feet or correct knock-knee postures.