When a person cracks their back, the sudden movement causes air pockets in the synovial fluid of the joints to react with a popping or cracking noise. Although cracking the back may feel good, it can ...

Your sternum is located in the middle of your chest and is also known as the breastbone. It protects the organs of your torso from injury and serves as a connection point for other bones and muscles.

Many conditions can cause pain in the sternum, including injuries, pneumonia, bronchitis, and costochondritis. Gastrointestinal problems, such as acid reflux, can cause pain behind the sternum. People ...