In 2015, research showed that bubbles remained in the fluid after cracking, suggesting that the cracking sound was produced when the bubble within the joint was formed, not when it collapsed. In 2018, a team in France created a mathematical simulation of what happens in a joint just before it cracks. The team concluded that the sound is caused by bubbles’ collapse, and bubbles observed in the fluid are the result of a partial collapse. Due to the theoretical basis and lack of physical experimentation, the scientific community is still not fully convinced of this conclusion.
The snapping of tendons or scar tissue over a prominence (as in snapping hip syndrome) can also generate a loud snapping or popping sound. For many decades, the physical mechanism that causes the cracking sound as a result of bending, twisting, or compressing joints was uncertain. Suggested causes included:
Goal of physiotherapy management:
Electrical stimulations like TENS, IFT to ease pain . Range of motion and stretching exercises for all joints to avoid any stiffness in the joint, strengthening exercises will be initiated to improve power of muscles.
This is necessary to promote joint protection and proper body mechanics when performing daily activities to maintain joint integrity.
Aerobic exercises should include low impact activities such as swimming, walking depending on the patient’s age and cardiovascular level.
Other advanced techniques like dry needling and taping have shown great benefits in relieving pain and stiffness. Physiotherapy management will target the affected joint and its attachments .