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Numbness in the right hand can be caused by a number of conditions. Numbness in your right hand means that you have lost the feeling or sensation in your fingers or hand. This can be caused by compression or other irritation of a nerve that travels to the fingers, hand or arm.
Types include: 1  Ulnar nerve compression at the wrist: This causes numbness and tingling of the little finger, part of the ring finger, and in the palm on the little finger side. 2  Ulnar nerve compression at the elbow: This causes not only the numbness noted above but also numbness on the back of the hand on the pinky side. Pressure on the radial nerve in the forearm or above the wrist: This can cause numbness over the back of the thumb, the index finger, and the web between these two fingers. Median nerve compression at the elbow: This can cause numbness not only in the same area as in carpal tunnel syndrome but also in the palm at the base of the thumb.