What is that "cracking noise"?

Your joints contain fluid that helps keep them healthy and lubricated (like oil in a car). This synovial fluid contains gas (like carbonation in soft drinks). When an adjustment is made you may hear a noise. This is know as an audible release and is simply the release of gas in the joint much like when you open a can of soda.  more

Your joints contain fluid that helps keep them healthy and lubricated (like oil in a car). This "synovial fluid" contains gas (like carbonation in soft drinks). When an adjustment is made you may hear a noise. This is known as an "audible release" and is simply the release of gas in the joint much like when you open a can of soda.

Between each bone in your body is fluid that keeps the joint lubricated. The fluid contains gas that is released when the adjustment is performed. Sometimes when the gas is released it causes an audible sound to be heard and other times no noise is heard, like when you open a can of pop and the carbonated gas is released.  more