Acupuncture is a complementary medical practice that entails stimulating certain points on the body, most often with a needle penetrating the skin, to alleviate pain or to help treat various health conditions. Developed millennia ago in China, numerous recent studies conducted by scientists in Europe and the United States have found that acupuncture is at least moderately effective in treating pain and nausea. Acupuncture originates from China and has been practiced there for thousands of years. Acupuncture involves the insertion of very thin needles through the patient's skin at specific points on the body - the needles are inserted to various depths. It provides therapeutic benefits, including pain relief and alleviation from nausea caused by chemotherapy.