Talk to General Physician on Numbness

when my mother lye down for sleeping her arms starting from shoulder till nails starts to numb, her back n legs also they feel heavy after numbness .she cant even sleep.even she is complaining that she can't read tasbih wile reading fingers gets numb.she is taking medication for diabetes. hypertension. depression .cholesterol. eye oct.her vitaminb12 is fine .vitamin d is always low. wht could b other reason than vit d.all d time she is having pain u. her maida .plz guide