In fact, it is normal to have such a sound, because we usually sit up for a long time, or there will be such a sound when stretching, indicating that this joint has some pressure and needs to be relaxed. If it's just a noise and there is no pain in a specific part of my body, there is no problem, just like we usually have such noise when we amputate our fingers.

Most of the joints in our body with a large degree of exercise belong to synovial joints, and the joint cavity contains joint fluid (lubricating fluid), which has a lubricating effect and is as smooth as egg fluid. The main components of joint lubricating fluid are water and a lot of nutrients. In addition to lubrication, it can also discharge bone and cartilage debris inside the joint.

Its main function is to cushion the impact between bones, and the liquid contains a lot of gas. When the joint moves, it will affect the volume and pressure of the joint cavity, so the gas will be released and the bubbles will burst because of the extrusion during our movement, which is normal.

The other is because the joint itself or its surrounding tissues are diseased, and most of them are accompanied by pain. However, if it is accompanied by pain or soreness, then this noise may attract our attention. Noise may mostly occur in meniscus, which may be caused by joint injury, such as rough synovium and rupture of articular disc. Especially for people with meniscus injuries. This noise may represent the re-injury of meniscus.

Therefore, it is normal for our joints to make such sounds occasionally during exercise. However, if we make such noise for a long time, it may cause some damage to our cartilage tissue, so we should pay more attention to this aspect in peacetime. If you find a problem, you should go to the hospital to consult a doctor or other professionals in time and adjust your training volume appropriately.