What causes the cracking sound in the knee joint?
Disease description:
When performing warm-up exercises, especially when moving the wrists and ankles, one may hear a cracking sound coming from the joints. What causes this phenomenon?
Doctor's answer (1)
Dr. Chen Jian
It is quite common in daily life for the knee joint to produce sounds, which can generally be categorized into several situations:
1. Physiological sounds: These sounds typically occur during movement of the knee joint, such as when squatting or standing up. The sounds are crisp and not accompanied by pain. They are mainly caused by the dissolution and redistribution of gas within the joint cavity and are considered normal phenomena, usually not requiring excessive concern.
2. Cartilage wear: With aging or excessive use, the cartilage in the knee joint may gradually wear down, leading to direct contact between joint surfaces and resulting in sounds. This situation is often accompanied by symptoms such as pain and swelling. Medical attention is recommended, and imaging studies may be necessary to assess the extent of cartilage damage.
3. Osteoporosis: This may also cause knee joint sounds. If the sounds are accompanied by symptoms such as pain, swelling, or restricted movement.
4. Ligament injury: If the ligaments surrounding the knee joint are damaged, sounds may also be produced during movement.
If the sounds are accompanied by symptoms such as pain, swelling, or restricted movement, it is recommended to seek medical examination immediately.
