Medically reviewed by Cara Beth Lee, MDYour knee may keep popping, clicking, crunching, or grinding due to harmless causes, ...

called synovial fluid," Girnita explained. "These bubbles form and collapse as you move or stretch, creating the 'popping' sound." If you've ever stood up after sitting for a long time and heard a ...

Although interesting, “cracking joints” and “popping knuckles” are not ... Your knuckles have a slippery fluid inside the joint (synovial fluid). This fluid helps you bend your knuckles ...

The researchers also studied fossils of extinct fishes dating back almost 400 million years and saw evidence that some of the ...

View Full Profile. Learn about our Editorial Policies. “The cavity in between the two knuckles is filled with a fluid that is called the synovial fluid, and when you suddenly change the pressure in ...

Synovial joints have synovial fluid in the joint cavity that lubricates or 'oils' the joint so it moves smoothly. Synovial fluid is made by the synovial membrane. In synovial joints, the ends of ...

Synovial joints have synovial fluid in the joint cavity that lubricates or 'oils' the joint so it moves smoothly. Synovial fluid is made by the synovial membrane. In synovial joints, the ends of ...