What causes pins and needles sensation with numbness in the whole body with weakness?

See your physician: Numbness and tingling in any extremity can be due to many reasons including sitting or standing in the same position for a long time, nerve injury, electrolyte abnormalities, vitamin deficiencies, etc. True weakness with paresthesias would be more concerning. See your physician for evaluation. You might be referred to a neurologist. http://www.ninds.nih.gov/disorders/paresthesia/paresthesia.htm