The knee pain from squatting for a while is mainly due to two reasons: one, due to strain or strain on the patellar tendon in this position, the formation of sterile inflammatory lesions, when the patellar tendon force will appear obvious pull. The patellar tendon is in a state of fatigue after squatting for a long time, so it is easy to experience pain in the knee joint. Second, because there is osteophytes around the knee joint, such as middle-aged women, especially women around 50 years old will gradually appear osteoarthritis formed by calcification and hyperplasia, will produce stimulation and extrusion of the surrounding tissue structure, it is easy to cause local inflammatory edema, especially after squatting for a long time bone spurs and calcification points on the surrounding soft tissue stimulation is more obvious, therefore, after the stool up when these The soft tissues will become more irritated when you get up after a bowel movement, resulting in pain in the knee.