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Did I hurt my finger by cracking my knuckles?

I crack my knuckles all the time out of habit, but now my middle finger on my right hand is numb. Did I injure my finger by cracking my knuckles? Is this possible and should I see a doctor about the numbness?
Cracking your knuckles is totally benign and has never been shown to cause any significant damage to the joints or to the hand. All you are doing when you crackle your knuckles is moving the fluid inside the joint around rapidly, which causes 'cavitation', or the production of small air bubbles in the joint fluid that burst and produce the noise. Therefore, if your finger stays numb, you will need to go see your primary care doctor to help you figure out what is causing this. If you have recently jammed or sprained your finger, or otherwise injured it, this could be the cause. If you have, your doctor may want to perform some x-rays to make sure the bones of the hand are all intact. Similarly, there are some nerve and over use injuries that can produce numbness in the fingers. The most common of these is carpal tunnel syndrome, which is associated with repetitive actions at the wrist, such as typing on a keyboard. Carpal tunnel syndrome causes numbness, pain, or weakness in the first three fingers of the hand (thumb, index, and middle fingers). It can be diagnosed or ruled out by your primary care doctor - please see him or her soon.
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under Zocdoc’s Terms of Service.

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