Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Joint popping
Name: danb
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: Around 1993

Why do your joints pop? For example, when I am walking my ankle always makes a popping sound? I think it has something to do with the air (space) in the joint but I do not know.

One reason is that tendons snap a little like plucking guitar strings. Another reason is because of a release of gas dissolved in the fluid of the joint. Sometimes joints make crunchy noises due to small bone fragments in the joint (like sand under a steel wheel). Joints can also make popping noises when they dislocate (this is usually painful).


Click here to return to the Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory