According to the principles of TCM, qiflows through the body via 14 primary meridians or channels. To strengthen the flow of qi,or remove blockages in the meridians, an acupuncturist inserts a number of tiny, sterile, flexible needles just under the skin at certain specific points (called acupoints) along the channels. There are four to five hundred named acupoints along the meridians, some of which are associated with specific internal organs or organ systems. If you are suffering from nausea, for example, needles might be inserted into acupoints on your wrist, while a vision problem might be treated with needles in the foot. (Additional ear, scalp, and hand points are also commonly used by some practitioners.) Acupuncture practitioners believe that the therapy stimulates the body's internal regulatory system and nurtures a natural healing response.