2. Zanthoxylum bungeanum has the effects of dispelling cold, relieving pain, killing insects and relieving itching. In addition to improving foot odor, it can also warm meridians to dispel cold and dredge meridians. Feet are the weakest part of human body's yang, and they are most vulnerable to wind-cold, wind, cold and dampness.

3, middle-aged and elderly people will have knee pain, or ankle pain, lower limb edema. The meridians on the feet will gather many important acupoints. Once these acupoints catch cold, it will lead to blockage of meridians and numbness of feet. Soaking Zanthoxylum bungeanum in water can warm meridians and dredge collaterals, activate these acupoints and meridians, restore the channels of yang in human body, and especially improve the weakness of yang in lower jiao. Besides Zanthoxylum bungeanum, Zingiberis Rhizoma, Folium Artemisiae Argyi, Carthami Flos and other medicinal materials can be added to strengthen the effect of warming meridians and dispelling cold.