"Was that my bones cracking?"
It's one of the most common questions people ask me as a chiropractor, and the answer is reassuring.
That familiar popping sound isn't bones breaking or snapping back into place. It's actually something called joint cavitation, a normal physical process that can occur when a joint is moved in a specific way. Much like cracking your knuckles, this movement creates a quick change in pressure inside the joint, causing gases dissolved in the joint fluid to form a small bubble, producing the "pop" you hear.
Importantly, not every adjustment produces this sound, and hearing a crack isn't necessary for the treatment to work. Some joints cavitate, others don't, and both responses are completely normal.
So what's really happening, and why do people often feel better afterward?
Scientific research suggests that spinal adjustments may affect the body in several ways. These movements can stimulate the nervous system, reduce muscle tension, and improve joint mobility. Some studies indicate that adjustments may temporarily change how the brain processes pain signals, which can help reduce discomfort. Others even suggest improvements in muscle function and coordination following treatment.
While the exact mechanisms are still being studied, the current evidence points to a combination of mechanical and neurological effects, and not the sound itself, as the reason people may experience relief.
So while the "crack" may get the attention, it's the body's response to the treatment that matters most.
This is general information, not a diagnosis. Every case is different. Talk to a healthcare provider about your specific symptoms.