According to the classic records of traditional Chinese medicine, "if the disease is located between the skin and bones, it can be obtained according to it, and the medicine can be used to block its qi, so that the property of the medicine can enter the meridians from the pores, or it can be raised or dispersed, which is particularly effective in teaching medicine."
Secondly, there is a saying that "taste enters meridians" in Chinese medical classics. Traditional Chinese medicine powder is applied externally to the affected area, and its taste enters the meridian points and reaches the viscera along the meridian, which not only drives away evil spirits but also regulates the viscera, and the effect is better than that of oral administration.