The effect of Angelica Si Reverse Tang is to warm the meridians, nourish blood and dissipate cold. It can treat the symptoms caused by blood deficiency and cold syncope syndrome (blood deficiency in the body and cold in the meridians, resulting in cold hands and feet, etc.). Dang Gui Si Yi Tang is mainly composed of Angelica sinensis, Paeonia lactiflora, Gui Zhi, Cinnamomum cassiae, Cynanchum officinale, Tongcao, Radix et Rhizoma Glycyrrhizae Praeparata, and Jujubae. It has the effect of nourishing blood and promoting circulation, warming the menstruation and dispersing cold. It is often used in the treatment of cold hands and feet caused by blood deficiency and cold syncope, or pain in the shoulder, arm, waist, femur, leg and foot, no thirst in the mouth, pale tongue and white coating. The adverse effects of Angelica Sinensis Si Reverse Soup have not been clarified, and those with Yin deficiency and fire are not allowed to take this formula. During the period of taking the medicine, attention needs to be paid to rest, and cold food should not be eaten. The application of the formula requires the doctor to combine the patient’s condition on the basis of addition, subtraction and customization before taking. If the patient is not feeling well, it is recommended to go to the hospital in time.