According to traditional Chinese theory of Yin-Yang and main and collateral channels,  base _disibledevent="mso-spacerun: yes">  a negative pressure _disibledevent="mso-spacerun: yes">  energy and blood, promoting blood circulation and dissipating blood stasis, reducing swelling and easing pain, eliminating the cold and removing dampness, eliminating toxicant and evacuating pus so as to enhance the human immunity and keep fit. It cures the disease without taking medicine and the user can get rid of the side effect.