This sensation of shock is due to the stimulation of a particular nerve. The cause can be either a wrong posture, some bony point pressing the nerve or nerve compression. If it is nerve compression then the next symptom to appear is mild tingling or numbness. I would advise you to review your routine. If there is a wrong posture of sleeping or sitting or a prolonged sitting at work place, then correct that. If the symptoms increase despite the change in lifestyle then you need to show to an Orthopedecian to rule out other causes.
In the meantime I would also advise you to atke some multivitamin with B12 in it to strengthen the nerves.
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Regards
Dr. Gupta

