The effects of Cangzhu mainly include drying dampness and strengthening the spleen, dispelling wind and dispersing cold (removing wind and dispelling cold), and can be used for dampness obstruction in the middle jiao (dampness obstructing the function of the spleen and stomach), and rheumatism paralysis and pain. Cangzhu is a Chinese herbal medicine made from the dried rhizome of Maocangzhu or Beicangzhu, a plant of the genus Cangzhu in the family of Asteraceae, which is pungent, bitter and warm in nature, and belongs to the spleen, stomach and liver meridians. This herb has the efficacy of drying dampness, strengthening the spleen, dispelling wind and dispersing cold, and is mainly used in the treatment of dampness obstructing the middle jiao syndrome, wind-cold and dampness hosting the surface syndrome, wind-dampness paralysis, night blindness (a kind of visual impairment lesion characterized by blurred vision in dim light) and dimness of the eyes and eyes. It should be noted that Cangzhu is contraindicated in people with Yin deficiency and internal heat, Qi deficiency and excessive sweating, and the adverse effects of the drug are not clear. It should be noted that the specific use of drugs should be carried out under the guidance of a specialist, not unauthorized use of drugs to avoid adverse consequences.