Cupping can be made tighter by drying the skin and fully combusting the air inside the can to create negative pressure. Cupping belongs to the Chinese medicine physical therapy techniques, in the cupping before the skin can be dried to prevent sweat on the canister to have an impact on the canister to cause the canister loosening. In addition, in cupping can make the fire cotton in the body of the canister fully burned, so that the air inside the canister to form a negative pressure, which is conducive to the canister and the skin fully close to the skin, so that the canister tightly on the skin. In addition, the size of the canister can also affect the effect of cupping, for the skin muscle parts such as the back, etc., you can choose a larger canister to increase the negative pressure of the air, so that the canister and the skin to fully fit. Patients who need cupping are advised to go to regular hospitals for treatment under the operation of professional physicians.