Nobody likes to be in pain.
Yet, it is not uncommon for people to have persistent or undefined pain, the lingering result of sports injuries, over-stressed muscles or illness. These are the pains that are difficult to treat. We may take analgesics, such as aspirin, but the pain persists. Yes, but it is not a contradiction to say that it helps free a patient of pain rather than causing pain. Originating in China, the procedure has been around for a long time - some 2,500 years, in fact.