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Cracking knees and black nails

20 year old male, have painful cracking in knees don't do sports or run. When I twist my leg or put my knees on the ground they crack and pop. Also i am a chronic nail biter and my nails have turned black.
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replied December 26th, 2017

Welcome to e health forum.

Your joints can make a variety of sounds: popping, cracking, grinding, and snapping. The joints that "crack" are the knuckles, knees, ankles, back, and neck.

Changes in the volume of synovial fluid which changes the intraarticular pressure, movement of ligaments or tendons around the joint, bone on bone grinding, etc. can be the causes of such sounds.

These sounds, also called crepitus, are usually painless and typically do not represent anything serious.

However, if the cracking noise is accompanied by pain, swelling, or some other concerning symptoms, then it may represent a problem

But, if you have doubts, consult a doctor and seek a proper opinion.



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