What makes the cracking sound in fingers?

Question

back leg etc..

Answer 1

To produce the clicking sounds, many people bend their fingers into unusual positions. These positions are usually ones that their own muscles are unable to achieve, and which are not commonly experienced in everyday use. For example, bending a finger backwards away from the palm (into extension), pulling them away from the hand (distraction), compressing a finger knuckle toward the palm (into flexion), or twisting a finger about the first bone's axis (torsion).

The snapping of tendons or scar tissue over a prominence (as in snapping hip syndrome) can also generate a loud snapping or popping sound

Causes of the sound

1. small cavities of partial vacuum form in the fluid then rapidly collapse, producing a sharp sound. This explains the popping that can occur in any joint

2. Rapid stretching of ligaments.

3. Adhesions being broken, which simply means that as two cartilage surfaces are pressed together, they form adhesions, and when the joints are separated this makes the popping or cracking sound.

Short-term

A single event is not enough to cause damage to the joint.

Long-term

Might cause arthritis.

higher risk of joint damage.

Answer 2

The Fluid in your joints, which allows them to move so smoothly.

When you crack them, it creates a bubble in this fluid, the cracking is it bursting.

Arthritis, is the lack of this fluid, which is why it is hard for people with it to move their joints.

Hope I helped.