Don’t worry, all that creaking and cracking doesn’t mean you’re getting old. The neck is a series of paired joints, called facet joints. Each is filled with fluid and surrounded by a capsule, says Albert Wu, MD, director of the Center for Health Services and Outcomes Research at Johns Hopkins School of Public Health in Baltimore, MD. “Bending the neck causes the membranes to stretch and pressure to change in those joints,” he says. “The sound is caused when the bubbles collapse, though some think that the sound is caused when the bubbles are created.” Whatever the cause, neck cracking is generally not harmful, but see a doctor if you experience pain—especially if it shoots down one arm. This could signal nerve root impingement, a pressure change of the nerve root that causes pain throughout the limb.
We know this is one of the strange facts about you’re body you’ve always wondered about. That odd, gurgling sound you hear after dinner is air and fluid moving through the digestive tract. If you hear grumbling on an empty stomach, your gut may be cleaning out leftover bits of food and fluid. Or, of course, it could be time to eat: When you’re hungry, the brain sends a signal to the intestines that stimulates the same action. If you experience high-pitched noises with cramping, pain, or nausea, but no bowel movements, get it checked out—it could be partial bowel obstruction, which sometimes requires surgery. These are the scientific explanations behind your quirky body reactions.
Wheezing when you twist
Hear a wheeze during a yoga class twist? Air moving out of the stomach or lungs travels through a narrowed airway when you twist, causing a wheezing sound. It’s not a problem unless you experience difficulty breathing—in this case, it could be indicative of short-term illnesses such as allergies or long-term issues such as chronic obstructive pulmonary disease (COPD).