[3] The underlying mechanism involves small tears in the tendon connecting the kneecap with the shinbone.

Magnetic resonance imaging can reveal edema (increased T2 signal intensity) in the proximal aspect of the patellar tendon.

Patellar tendonitis is common in athletes who participate in activities that include a lot of jumping, changing directions, or running.

[2] Having a clinical diagnosis is the preferred way to diagnose patellar tendonitis, due to ultrasonographic abnormality.

Tentative evidence supports exercises involving eccentric muscle contractions of the quadriceps on a decline board.

[13][14] Specific exercises and stretches to strengthen the muscles and tendons may be recommended, e.g. cycling or swimming.

[2][dubious – discuss] Without proper rest and rehabilitation, patellar tendonitis can worsen, causing persistent pain.

[citation needed] Dry needling, sclerosing injections, platelet-rich plasma, extracorporeal shock wave treatment (ESWT), and heat therapy have been tried.

Novel treatment modalities targeting the abnormal blood vessel growth which occurs in the condition are currently being investigated.