Patellar ligament injuries are often caused by sharp cuts or sprains, and patients can experience the following symptoms: First, pain, which can be evident at the patellar ligament injury below the knee, and a ringing sound can be heard at the time of injury, which is the ringing sound of a complete rupture of the patellar ligament. Second, swelling, in the patellar ligament injury can appear local bleeding, this can appear swelling, often accompanied by soft tissue damage around the ligament, aggravating the swelling. Third, limited activity, when the patellar ligament injury can appear in the knee joint can be significantly limited in extension activities, this time to carry out the relevant examination, early nuclear magnetic examination, determine the extent of ligament damage, if the complete injury, but also for surgery, if the partial injury, can be early braking of the knee joint, oral drug therapy.