Knee rustling is mostly due to wear and tear, the ringing may also occur in normal people, such as developmental abnormalities, discoid meniscus and other conditions can cause the activity of the ringing. But the rustling situation is mostly seen in the early arthritis, chondromalacia patella, this time in the knee flexion and extension activities or excessive force can occur when the ringing sound, the hand on the knee and patella can be felt above the obvious friction and accompanied by the ringing sound. This situation needs to be alert to the continued development of arthritis, need to temporarily reduce the activities, avoid climbing stairs, mountain climbing and other activities that damage the knee. If you are overweight, you need to pay attention to weight loss, and exercise your muscles under appropriate non-weight-bearing conditions. If the sound or pain worsens, you need to go to the hospital for examination in a timely manner.