When squatting, there is always a ringing sound in the knee joint, which can be caused by physiological reasons or trauma, osteoarthritis and other pathologic reasons, according to the cause of the disease to take braking, medication or surgery and other treatments. 1. Physiological causes: often appear when changing the position of the knee joint, such as squatting and standing position alternately, the above symptoms, generally belong to the normal situation, do not need special treatment, but pay attention to change the position of the movement gently. 2. Pathologic causes (1) Trauma: common in meniscus injury or ligament injury, etc., which can be treated by braking, resting, using antipyretic and anti-inflammatory drugs such as aspirin, etc., and surgery if necessary. (2) Osteoarthritis: caused by long-term chronic wear and tear, it can be treated by the above conservative methods, and can also be relieved with infrared and other physical therapy, and surgery can be considered when necessary. When squatting, there is always a ringing sound in the knee joint can also be seen in congenital dislocation of the knee joint, tendon dislocation, etc. It is recommended to go to the hospital in a timely manner, and follow the doctor’s instructions for treatment to avoid delays in the condition.