It occurs for three main reasons: one is an injury to the knee tendon caused by one or more excessive traction forces; the second is a tendonitis caused by poor local circulation in the knee tendon, similar to the shoulder tendonitis that often occurs in swimmers; and the third is an inflammation of the knee tendon caused by an adverse immune or metabolic response to the injury. The pathological changes are mainly localized degeneration and inflammation of the knee tendon, while the tendon fibers near the knee bone attachment are ruptured. Some scholars believe that this should not be considered a benign condition that can heal on its own, because tendonitis causes a loss of continuity in the tendon fibers and then causes localized tissue degeneration and necrosis, and produces nodular scarring that reduces the elasticity and strength of the tendon fibers; if too much resistance is encountered, the tendon can easily rupture. ”According to the degree of tendon inflammation, it can be divided into four stages: Stage 1: the mildest, knee pain only occurs after running and jumping, so it does not affect the sports situation. Stage 2: A little more severe, knee pain occurs during running and jumping, and it still hurts after stopping the exercise, but the pain is not very severe, so it still has the ability to exercise. Stage 3: More severe, knee pain occurs during running and jumping, and it still hurts even after you stop exercising, and the pain is so severe that you cannot maintain your original athletic ability, so most patients seek medical attention at this time. Stage 4: The most serious, and also the knee tendon has been ruptured, which is often the result of untreated or improperly treated tendonitis in stage 3. The point of pain in the jumping knee is more painful if pressure is applied to it, and occasionally mild localized swelling can be seen. This pain can be triggered in a specific way, and is more painful when the quadriceps (front thigh muscle) and its knee tendon are contracted with force, so the knee pain is especially noticeable when running, jumping, playing soccer, going up and down stairs, hiking, or doing half squats. ”The best way to cure tendonitis is to stop playing sports that focus on running and jumping. This is especially important for people who have developed bad structures in their lower limbs; that is, if you have lower limb problems in addition to jumping knees, well, die trying and stop playing jumping sports! Those who do not want to give up jumping and running can get satisfactory results if they are treated according to the following principles. The first and second stage of knee tendonitis patients must minimize the amount and frequency of exercise to prevent the condition from worsening; in order to quickly reduce pain, in addition to the need to prepare for exercise, it is best to first warm up, or soak in warm water at 40 degrees Celsius for 30 minutes, before starting to warm up and prepare for exercise. Second, after exercise, it is best to quickly apply ice, massage with ice, or soak in cold water at 10 degrees Celsius for about 20 minutes, or soak in cold water until the pain disappears. At this time, if oral “non-” steroidal anti-inflammatory painkillers are also very effective, if necessary, you can inject local anesthetics to achieve rapid pain relief purposes. Although it can prolong the effect of anti-inflammatory and pain relief for more than two to three weeks, it can also cause local tissue atrophy and degeneration. It has been shown that a single steroid injection can weaken a tendon for up to two or three weeks. Patients with stage III tendonitis must temporarily stop running and jumping or doing those movements that cause pain, and use physical therapy (such as heat, short wave or ultrasound therapy, etc.) and medication to reduce the symptoms of inflammation and pain until the pain is completely gone before starting to exercise, otherwise it may deteriorate to stage IV and cause rupture of the tendon. Many doctors especially remind patients not to have the concept of “no pain is healing”, especially after taking medication or local injection painkillers when the pain is reduced, immediately go to sports and “abuse” his tendon, at this time, if not properly rest for a period of time, the result may cause the injury to recur, or even cause the tendon rupture will be more than worth it! Only a few patients with particularly severe stage III and stage IV tendonitis must undergo surgery to remove the diseased part of the tendon or re-suture the rupture, and then with complete post-surgical rehabilitation treatment, so as to obtain the ideal results. Therefore, if you have knee pain, don’t ignore the prevention method is not to delay too serious before you want to seek medical treatment.