Whenever I Sit there is a popping sound made by me knees... but it is painless.. I only happens when I sit by bending my knees... its been for several years... is this a matter of concern? As it is painless and I have no issue related to it that is no issue in walking, standing, bending my knees, doing yoga, so I am only worried about that popping sound or you can say a crackling noise which is being produce... is it normal or a matter of concern.
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