The efficacy of Angelica Si-Yi Tang depends on the patient’s own condition and cannot be generalized. Danggui Siwei Tang is composed of several medicines: angelica, cinnamon sticks, fine pungent, licorice, peony, jujube, and Tongcao. It has the efficacy of warming the meridians and dispersing cold (warming the meridians of the human body to get rid of the cold in the body), nourishing blood and opening the veins. This formula can be used if the patient has symptoms of blood deficiency, pale tongue with white coating, thin or weak pulse, or cold limbs. This formula is designed for Blood deficiency due to cold, and is contraindicated for women during pregnancy and postpartum. During the period of taking this medicine, attention should be paid to preventing cold and keeping warm, and the diet should not be cold or raw. This formula should be used under the guidance of a physician, and patients should not blindly self-medicate to avoid adverse consequences.