Acupuncture is a way of healing by reactivate or re-balance your body's nature flow of energy. It can stimulus body's energy flow and cells functions; hence to restore your healthy state. There are many application theories behinds acupuncture, "meridians" is the most well-known traditional theory. Others like the pain points, reflexology, X mirroring/imaging also had been documented in ancient literature, or discovered in modern days. If any of those channels or points are obstructed, so does our energy flow, and our whole body will be impacted and resulting in pain or health issues.