Carpal tunnel : The most common cause of numbness in the middle finger of the hand is compression of the median nerve at the wrist. The middle finger is followed by the index finger, thumb and half of the ring finger. If you also have blanching of the finger along with numbness you may have raynaud's syndrome, a vascular constriction brought on by cold. Wrist position can affect the numbness.
Answered 3/24/2019
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