Lightly tap the bag wherever you have pain or discomfort. The bag will help to open up the bodies energy channels to improve good health. Effective means to relive pain from carpal tunnel and other hand/wrist ailments. Just tap or place under your wrist while typing. feel the difference. Tap on the neck to help with neck pain or headaches Used to alleviate stress and pain and to help open the meridians in the body. Derived from the movements from Yu Dong Myung Sang which is a foundational development for Nae Gong (Nae Gong was developed over the centuries by true Moo Doe Masters; and is the highest level of internal Moo Doe development one can achieve. It is much more difficult to achieve than Chi Gong, but the benefits are also much greater.) Beginning Yu Dong Myung Sang is one of the eight combinations of mental and physical movements of the Nae Gong foundation. Yu Dong Myung Sang movements must be performed absolutely correct, and it incorporates a deep meditative state. Each Bag is good for up to 90 days of daily use. Do Not Wash