Acupunctureis the insertion of fine, hair-like needles into specific locations on the body. These are solid, disposable and sterile needles. Nothing is injected into the skin. With the insertion of the needles, you may feel a pin prick or pinching sensation. Needles are generally left in place for 20-30 minutes while you rest. As you rest you may feel sensations of warmth, numbness, and a tingling or electrical sensation along with a sense of well being. This is your energy moving to the trouble areas to restore the smooth flow of vital energy or Qi .