Medical Questions > General Forum Topics > General Q and A Forum

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.
Thank You
Did you find this post helpful?

User Profile
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.

Did you find this post helpful?
Quick Reply
Must Read
Chronic pain affects more than 70 million Americans. But what is pain? And how can pain management help relieve different types of pain? Basic facts here....
How does the nervous system work to register pain? And what are the major causes of acute and chronic pain? Plus, who's at risk of pain here....
Acute and chronic pain manifest different symptoms. Learn the difference here and know when to seek medical help for pain....
DISCLAIMER: "Ask a Doctor" questions are answered by certified physicians and other medical professionals. For more information about experts participating in the "Ask a Doctor" Network, please visit our medical experts page. You may also visit our General Q and A , for moderated patient to patient support and information.

The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician. Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.