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See MD: Hand numbness likely is due to pressure on the nerve either from damage, inflammation or direct pressure. Throat sensation can be topical in nature - not likely lemon water, but excess acid could irritate it. This may also be nerve related. So, get to the MD and find out what is going on.
Numbness that starts as a tingling in the hands, fingers, legs, and feet is often an early warning sign of diabetes. This occurs due to an increase in blood sugar levels, causing blood vessel restriction to the extremities, and eventually damage to nerve fibers. For many, this numbness is often the first sign of any health issues. Diabetes numbness presents in a prickly, tingling, or pain in the hands and feet that starts out minor at first, but as the nerve damage progresses over times, and sometimes years, mild tingling can become chronic and quite painful, involving motor function, sensory, autonomic and involuntary nervous system response with a sudden and painful and numbness in the fingers, toes, feet, hands, legs, and arms, sometimes ...