This is the most common cause. Joints are surrounded by synovial fluid, which acts as a lubricant and contains gases like oxygen, nitrogen, and carbon dioxide. When you move or stretch, pressure changes in the joint can cause these gases to form bubbles and then rapidly collapse, creating a "pop".
In medical terms, the grating or popping noise in your joints is called . Here are the primary reasons it occurs: Why Do My Toes Crack When I Walk
That "snap, crackle, pop" coming from your feet as you move across the room can be startling, but it is a very common experience for many people. While the sound might make you (or those around you) cringe, it is usually harmless unless accompanied by pain. This is the most common cause
Your tendons and ligaments stabilize your joints. Sometimes, as you walk, these connective tissues may snap over bony surfaces or slightly shift out of place before clicking back into position. In medical terms, the grating or popping noise
Previous trauma, like a severe sprain or fracture, can leave behind scar tissue (adhesions) or cause minor misalignments that lead to frequent cracking. When Should You Be Concerned? Are Cracking Toes a Sign of Arthritis? - Verywell Health