Traditional Chinese medicine (TCM) originated in ancient China and has evolved over thousands of years. In the United States, people use TCM primarily as a complementary health approach. Acupuncture is presently considered an alternative or complementary form of medical treatment. The National Center for Complementary and Integrative Health states there have been extensive studies conducted on acupuncture, especially for back and neck pain, osteoarthritis/knee pain, and headache. However, researchers are only beginning to understand whether acupuncture can be helpful for various health conditions. Acupuncture is a safe, painless alternative for treating a wide range of conditions.