Depends ..: It could be from multiple sources. It could be related to compression of nerves stemming from the neck, armpit(axilla), elbow or (less likely) the wrist area. It could be a toxic/nutritional deficit effect on the sensory nerves, though this tends to affect both sides. It could be from a particular issue within a sensory area of the brain(exceptionally unlikely).
Answered 10/19/2018
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A doctor has provided 1 answer
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