The role of the knee joint permeates all aspects of our lives, and every step we take is inseparable from the knee joint, so knee pain can seriously affect our quality of life, even squatting down to tie our shoes can feel pain. So, what are the causes of knee pain? What can we pay attention to in our daily life and activities to avoid this injury? 1, fat pad strain: fat pad filling the gap in the front of the knee joint, has the role of strengthening joint stability and reducing friction. Trauma or long-term friction causes fat pad congestion, hypertrophy and inflammation, and adhesions with the patellar ligament, which can limit knee joint activities. This injury occurs in people over 30 years of age who walk, hike or squat frequently. Patients may feel pain in the knee joint, and the pain increases when fully extended, but the joint movement is not restricted, and the symptoms are obvious after exertion. 2, meniscal injury: a common injury in athletes. Meniscus injury will have a pronounced knee tearing sensation, followed by joint pain, limited movement and walking limp. The joint exhibits swelling and slippage, and there is a popping sound when the joint moves. 3. Traumatic synovitis of the knee: Damage to the synovium due to factors such as trauma or overexertion will produce a large amount of fluid, which will increase the pressure in the joint and, if not eliminated in time, will easily cause joint adhesions and affect normal activities. Patients will feel pain, swelling and pressure in the knee joint, and the synovial membrane will have a frictional and astringent sound. The most obvious feature of the pain is that when the knee joint is actively and extremely extended, especially when there is a certain resistance to do knee extension movement, the pain in the lower part of the patella will increase, and the pain is also significantly increased when it is passively and extremely flexed. 4, osteoarthritis of the knee joint: this condition is mostly seen in middle-aged and elderly people, mostly women. Overweight loading is the main cause of the disease. The knee joint will be swollen and painful, sometimes there will be friction sounds when moving the joint, and the knee may have an inversion deformity and be accompanied by medial pain. 5. Knee ligament injury: The stability of the knee joint is relatively poor when it is slightly flexed. If the knee is suddenly subjected to external forces that cause valgus or inversion at this time, it may cause medial or lateral collateral ligament injury. Medial collateral ligament injuries account for the vast majority of clinical cases. 6, warm up improper or no warm up: many people exercise, often first do leg extension exercises, I do not know that leg extension exercises is the main cause of knee injury. When exercising, the knee has to withstand enormous pressure, so it must be properly warmed up to avoid injury. Exercise without warming up is the same as not giving the joints natural lubrication, and the knee joint certainly does not run smoothly. In addition, cold, tense muscles are also detrimental to the smooth functioning of the joint. Suddenly starting or ending movements can tear the muscles around the joint, causing or exacerbating overuse injuries. 7, over-exercise: often counterproductive, not only reducing physical fitness, but also a factor in knee injuries. If you feel discomfort in your knee while exercising, that’s acceptable; if you feel pain after doing the exercise, or the next day, the situation is not good. Prolonged pain, limp and swelling around the knee, these are the warning signs of knee injury, should immediately seek medical attention. 8, too fat weight: improper diet too obese people, the knee joint will have to bear more weight, the knee sooner or later, “the death of”. Like walking upstairs such a simple action, the pressure on the knee is usually 4 times! If you are 5 kg overweight, each time you climb the stairs, it is equivalent to carrying 20 kg more “fat”! Generally, the treatment of knee pain is based on conservative therapy, the most common of which is medication to reduce pain. In addition, injections or physiotherapy are used, and only in severe cases is surgery performed. When the knee injury is mildly painful, there is no swelling, and you can move or walk, you can usually get better after 3-7 days of rest. When there is swelling, severe pain or a sudden jamming of the joint or a clicking sound, you need to seek medical attention. It is important to remind elderly people not to use hot compresses to reduce swelling and pain during acute knee attacks, especially when the knee joint is red and swollen and hot, so as not to overheat and aggravate the local swelling, but to use pain relief creams or acupuncture point compresses externally.