Why Does My Knee Crack When I Stand or Squat? Joint Sounds - Orthopedics

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When you experience cracking or popping sounds in your knee while standing up, squatting, or bending, it can be concerning. However, it's important to understand that these sounds, known as "crepitus," are often benign and can occur for various reasons.
One common cause of knee cracking is the movement of tendons or ligaments over the bony structures of the knee. As you bend or straighten your knee, the patellar tendon, which connects the kneecap (patella) to the shinbone (tibia), may snap over the bony prominence of the femur. This can create a popping sound, which is usually harmless, especially if it is not accompanied by pain or swelling.

Another potential reason for the sounds could be related to the presence of gas bubbles in the synovial fluid of the joint. When you move your knee, these bubbles can burst, producing a cracking sound. This phenomenon is similar to the sound you hear when you crack your knuckles.
However, if the cracking is associated with pain, swelling, or a feeling of instability in the knee, it may indicate an underlying issue that requires further evaluation. Conditions such as patellofemoral pain syndrome, meniscus tears, or early signs of osteoarthritis can lead to joint sounds along with discomfort.
In your case, since you mentioned that you rarely exercise and primarily walk, it’s possible that the lack of regular physical activity may contribute to muscle weakness around the knee joint. Stronger muscles help stabilize the knee and can reduce the likelihood of joint sounds. Engaging in low-impact exercises, such as swimming or cycling, can help strengthen the muscles around your knee without putting too much strain on the joint.

Long-term, if the cracking is not associated with pain or other symptoms, it is generally not a cause for concern. However, if you notice any changes in your knee's function, such as increased pain, swelling, or difficulty in movement, it would be wise to consult a healthcare professional. They may recommend imaging studies, such as X-rays or MRIs, to assess the condition of your knee joint and rule out any significant injuries or degenerative changes.

In summary, while knee cracking can be a normal occurrence, it’s essential to pay attention to any accompanying symptoms. If you are concerned about the sounds or if they worsen over time, seeking advice from an orthopedic specialist would be beneficial. They can provide a thorough examination and recommend appropriate treatment or preventive measures to maintain your knee health.