What noise is there in the knee joint?

1 Physiological snapping sound Some people have a snapping sound in their knees when squatting, a slight "quack" sound in their hip joints when walking, and a noise in their neck and cervical vertebrae when shaking hands ... These sounds are often called "snapping".

Generally speaking, only snapping sounds, which are not red or swollen in appearance, do not feel pain, and are not accompanied by dyskinesia, are all physiological snapping sounds, and do not need special treatment or worry too much about them.

2 Meniscus injury When the meniscus of the knee joint is injured or there is a free body in the joint, the knee joint can bend, stretch and rotate, and a crisp click sound can appear. If the short and rough rolling sound is accompanied by obvious joint vibration, it means that the physiological discoid meniscus is broken.

3 Arthritis The noise in the knee joint is mostly knee arthritis or osteoarthritis, which is caused by degenerative diseases of the joint, degenerative damage of articular cartilage, and reactive hyperplasia of bone at the joint edge and subchondral. Can cause local swelling, snapping, edema, pain and other symptoms. Most patients have a sense of friction or a "click" sound when they move, and in severe cases, muscle atrophy and joint deformity may occur.

Chondromalacia patellae is more common in middle-aged and elderly people. When the knee joint bends and stretches, the symptoms are swelling, pain and joint noise. When you press the patella with your palm and rotate it, you can feel that the surface of the patella is uneven and there is a "rustling" sound when rubbing against the femoral condyle. It is mainly caused by the uneven surface of patella cartilage, local cartilage destruction or incompleteness, subchondral bone cystic change and hyperosteogeny of patella margin and femoral condyle.