Why do we hear popping and cracking sound in knee joint?

Why do we hear popping and cracking sound in knee joint?

This is the most common question come across from most of people.Occasional popping or cracking can be normal and is generally consider harmless. However, if the noise occurs regularly and is painful then it’s a point of concern.

There are top 5 reasons because of which we hear sound in knee joint.

1. Bursting of gas bubbles -  It happens when carbon dioxide builds up in the joints synovial fluid and is released as a gas bubble that bursts when the joint adjusts rapidly. Bursting of these bubbles makes popping or cracking sound in knee joint. It is absolutely normal and can happen on day to day basis.

2. Osteoarthritis of knee – osteoarthritis of knee is very common. Because of wear and tear, aging and degeneration the smooth cartilage that surrounds the bone which forms the joint gets pitted and roughened. This hinders the smooth movement of knee joint and leading to noise called as crepitus.

3. Overuse injury of knee – Repeated movements in improper pattern or overweight puts excess pressure or stress on knee joint affects the smooth movement and alignment of knee cap also leading to this noises.

4. Malalignment of knee cap bone – knee cap bone also called as patella is attached to the tendon of front thigh muscle. If there is weakness or tightness of this muscle it affects the ability of knee cap bone to glide smoothly on the knee joint surface this leads to popping or cracking sound in knee joint.

5. Injury or impact to knee joint – injury to knee joint can also be a reason for these cracking sound as because of injury there will be damage inside knee which affects smooth movements of knee joint.

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