1. Use small bags for the first 20 days. A small bag is an open bag. When in use, it is necessary to preheat the medicine bag in the mesh bag of the belt for three minutes, then turn the preheated medicine bag sideways, aim at the navel, and fasten the belt, so as to ensure the full play of the medicinal properties in the medicine bag.

2. Use the big bag after10. The big bag is a hole sealing bag. The use method is the same as that of the open bag. It is also necessary to preheat first, then aim the preheated medicine bag at the navel and fasten the belt.