Acupuncture is a traditional Chinese medical practice that involves inserting thin needles into specific points on the body to stimulate energy flow, known as "qi" or "chi." It is used to treat a variety of conditions, including pain, stress, and chronic illnesses, by restoring balance and promoting natural healing processes. The practice, which dates back thousands of years, is based on the concept that the body's energy pathways, or meridians, must be free of blockages for optimal health. Modern research suggests that acupuncture may trigger the release of endorphins and affect the nervous system, contributing to its therapeutic effects.