What is the cause of pain when bending and straightening the knee

The knee is very painful even when it is bent, which makes many patients suffer. In this case, we should pay attention to whether it is caused by ligament adhesion or synovitis. After understanding the cause, we can treat and solve it.

1. Ligament adhesion and synovitis are pathological symptoms that may cause knee pain, but if there is no obvious discomfort or history of trauma, there is no need to worry too much. Tight quadriceps, tight tensor fasciae latae, lack of stretching of hamstrings, iliopsoas and iliotibial band are all possibilities, and these conditions may also occur at the same time.

2. Another possibility is that the quadriceps are not strong enough. The questioner can do a test: sit down with the calf perpendicular to the ground and straighten the knee. If the mind feels the knee joint and there is a sound, and the mind is focused on the contraction of the quadriceps to achieve the purpose of straightening, the sound disappears, then it is possible that the quadriceps are not strong enough. If the questioner sits upright and pedals an indoor bicycle (upper body straight, not holding the handlebars) and feels that the knee sometimes makes a sound; and the body leans forward and holds the handlebars, the sound disappears, then there are several possibilities - lack of stretching of the iliotibial band, lack of flexibility of the quadriceps, and excessive tightness of the lateral collateral ligament. The sound is sometimes caused by friction between the joint capsule and the ligament.

3. It may also be that the strength of the inner and outer heads of the quadriceps is unbalanced, resulting in the malposition of the patella. If there is no obvious discomfort, there is no need to worry too much, but muscle balance and muscle stretching are very important issues. Even if there is no problem now, there will be problems in the long run. It is recommended to rest first, stretch the muscles, and massage with a foam roller. Then accumulate knowledge about muscle balance and posture correction during this period. You can pay attention to Zhihu,

4. In fact, if there is no obvious swelling or pain, it is safe to assume that stretching and massaging, and reducing the frequency or intensity of exercise can relieve the pain. 70% of the pain is caused by tight iliotibial band and hamstrings. However, if there is joint locking, unbearable swelling and pain, and severe hamstring spasm (symptoms of posterior horn meniscus tear), then it is best to go to the hospital immediately.