Patellar tendinitis is inflammation of the tendon that connects the kneecap to the tibia. It is located in the front of the knee, just below the kneecap, and intervenes in the movements of knee extension. This tendon can become inflamed and cause pain in the performance of certain activities involving overexertion and repetitive minor trauma. The main symptom of this type of tendinitis of the knee is pain that increases when the tendon force (usually with running, jumping or climbing stairs), and in the most severe cases, can hurt even when walking. The treatment of patellar tendinitis is rest, anti-inflammatories, local application of cold and rehabilitation exercises of the quadriceps muscles. If the above measures no improvement is obtained infiltrations may be required and only sometimes opt for surgery.