A member asked:

My knee often cracks loudly when straightening, but without pain. cause for alarm? what is typically the cause of that?

A doctor has provided 1 answer
Dr. Edward Hellman answered

Specializes in Orthopedic Surgery

Arthritis: Ther are many potential causes, but Ina 39 year old the most common cause is early degenerative arthritis. When cartilage is healthy, the smooth surfaces glide over each other. As the sugars wear, they become irregular which causes a grating and popping sensation known as crepitance. Don't hesitate to be seen.

Answered 10/13/2014

3.6k views

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