Patellar tendonitis cures?

Relative rest. Things to try: regular NSAID use, restrict painfull activities (squattting and kneeling), restore quadricep strength and stretch illiotibial band.
Treatment options. My suggestions to patients with patella tendonitis consist of rice, anti-inflammatories (oral/ topical), quad stregthening, lower extremity stretching. I also may suggest ice massage, or counterforce bracing. If the above list does not help then you may want to consider discussing prp with your physician based on some recent literature (http://drmarkgalland.Com/category/knee/).