Answer: The question of why some people have their knuckles crack more often than other people do, it is most likely due to a combination of genetic and behavioral factors. Genetic variation causes slightly different joint structure in different people, which can increase or decrease synovial pressure, making cracking knuckles more or less necessary. Plus, behavioral differences in how different people use their hands through the day can effect how often cavitation occurs, which determines how often knuckles crack. In addition, when you start cracking your knuckles it will be quite difficult for you to stop, probably this is a behavioral factor that will stay with a person forever. Many link knuckle cracking to arthritis, but that is not proven yet. Experts advise people to not be addicted to this habit as there is no need for it and it doing it excessively could cause a different shape of your hand as you get older. As too experts say you will be harming your tendons, etc... Answered By: Ali Sabah Al-Takmachi, University of Sharjah, College of Medicine,2009.
Answer: Your hot exhaust is cooling down and the metal is making a ping sound, chances are though, that your exhaust is possibly getting too hot, or has some loose components inside or bolted to it. If your exhaust rattles at all, you may need to replace the muffler, and if you car has a trouble code related to misfire, or catalytic converter there may be too much fuel in the exhaust and is too hot.
Answer: The amount of bones in each area varies and in the ankle with has more bones and also carries some of your body weight has more stresses on it. Cracking of the bones releases built up calcium and then your bones rub together. ANSWER: When a joint pops once, Its a release of built up gas pressure (usually nitrogen gas) . When It can pop time after time, Its a bone to bone contact and over time can cause inflammation of the joints, bone chips, and enlarged knuckles.
Answer: No it is perfectly fine. Some people say it causes arthritis and joint problems but those are myths. When you crack anything, it is releasing trapped fluids that your joints produce, and it makes a popping sound. It is not bad at all.
Answer: They used to say that cracking your knuckles would give you arthritis. A doctor friend of mine says that that is not true; that "popping" your knuckles is just releasing gasses in the joints. However, the danger with cracking your knuckles is over-extending them or flexing them too far, which could cause pulled muscles or eventual joint damage.