You may feel a slight sensation resembling a pinch or a mosquito bite when the needle is inserted. Once the needles are placed there may be a slight tingling, numbness or heaviness in the area while the practitioner is stimulating the point. These are positive signs that the needles are affecting the acupuncture point. Usually you will be lying on a comfortable padded table or in an easy chair. Often, people become very relaxed and fall into a light sleep during the session.