Why does my back crack?

Answer

According to the Library of Congress, bones crack because of the combination of escaping gases, movement of the joint and rough surfaces. Not all joints make cracking sounds. Those joints that make audible sounds include the knees, ankles, knuckles, back and neck.

The Library of Congress explains that joints contain a lubricating liquid called synovial fluid. Synovial fluid contains several dissolved gases, including oxygen, nitrogen and carbon dioxide. When a joint is bent or pulled apart, the gases in the synovial fluid escape. This is what causes the sounds made when a person cracks his back. The reason that a joint cannot be cracked repeatedly is that it takes time for the gases to replenish in the synovial fluids.

In addition to the escape of synovial fluid, arthritis causes joints to make sounds. This occurs because many arthritic joints have missing or worn-out cartilage. This makes the bones grind against each other, producing cracking or grinding noises. Tendons also cause sounds to come from a joint, according to the Library of Congress. In some joints, especially those of the knees and ankles, tendons snap back and forth, which can create a cracking sound. Medical professionals disagree as to whether repeatedly cracking joints is harmful.

Reference:
Q&A Related to "Why does my back crack?"
Necks crack when pressure that is contained within the joint is released. Gases held within the synovial membranes are then freed. I've been told constantly not to pop my neck, but
http://www.ask.com/web-answers/Health/Diseases/why...
Cement naturally shrinks when it dries, which means all concrete formats that contain cement, such as cement stones, will also shrink. The estimate is that concrete shrinks roughly
http://www.ehow.com/info_12197856_cement-stone-cra...
Cracked versions of anything is illegal but the reason your having that problem is because when you buy the pro version of Game Maker like I did, I learned that when you do, your
http://wiki.answers.com/Q/Why_does_my_cracked_vers...
If you have pain while running or jumping and tightness, the diagnosis could be Achilles Tendonitis. This is inflammation of Achilles tendon, which attaches the calf muscles to the
http://www.ehow.com/facts_5880944_back-heel-hurt_....
Explore this Topic
In order to crack your upper back, you must first loosen and stretch the muscles in your upper back. Next, you should sit or stand as straight as you can and pull ...
You can crack you own back by using a door frame. You can lift one leg and rest it against the door frame. Move the lower body toward the door frame and repeat ...
There are a few things that can be happening when a person's back cracks. It could be movement between the disk and the vertebra. It could also be the movement ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com