Hi welcome to Health care magic forum. you are getting the numbness
only when you are sleeping and also sweating. It suggests that it may be cervical spondilosis with more effect. that is why you are getting the sweating as well. other possibilities are cardiac involve ment.
I advise you to consult a general physician for diagnosis and treatment. you may have to undergo DIGITAL XRAY OF THE CERVICAL SPINE
, ECG TMT and other routine tests for confermation of the problem.
Besides i advise you some diet recomendations as Avoid taking potato, othe tubers, tomato, fish and other sea foods to avoid orthopedic involvement.
Wishing for a quick recovery and thanks for calling.