Bone and joint clicking during exercise may be a normal phenomenon if it is not accompanied by other uncomfortable symptoms. If accompanied by other uncomfortable symptoms, may be meniscus injury, osteoarthritis and other diseases. 1. Normal phenomenon: Normal people who have not been playing sports for a long time, or exercise strenuously, may lead to bone and joint popping, appearing bones and joints clicking during exercise. If it is not accompanied by other uncomfortable symptoms, it is a normal phenomenon, no need to worry too much. Warm up before exercise to protect the joints can be done. 2. Meniscus injury: meniscus injury is caused by knee twisting, long-term strain and other factors. Patients may experience pain, joint popping, swelling and other symptoms, manifested as bone joints clicking during exercise. 3. Osteoarthritis: Osteoarthritis may be caused by abnormal bone metabolism, stress imbalance, overloaded joints, infection and other factors. The patient’s symptoms are joint pain, activity limitation, bone friction sound, joint weakness, etc., manifested as bone joints clicking during exercise. There are many reasons that lead patients to develop bone joint clicking during exercise, and it is recommended that patients identify the cause of the disease in a timely manner.