Yuan Hu is Yan Hu Suo, which has the effect of activating blood circulation, promoting qi circulation and relieving pain, and is used for pain in the chest and ribs, epigastric (abdominal) pain, chest paralysis (chest pain) and heart pain. It is not recommended for blood-heat and Qi deficiency and pregnant women. Yan Hu Suo is pungent, bitter and warm in nature, belonging to the liver, spleen and lung meridians, and is commonly used in the treatment of chest and hypochondrium, epigastric pain, paralysis of the chest and heart pain, menstrual cramps and dysmenorrhea, post-partum stasis, and swelling and pain in falling and thumping. In addition to the individual use of Yanhuisuo also used in conjunction with other drugs, such as the treatment of cold hernia abdominal pain (cold internal organs and feel the external wind-cold caused by acute abdominal pain), can be matched with fennel, Cornus officinalis and other liver and qi, dispersal of cold pain (through the elimination of the body’s cold to relieve the pain) of the product. It is recommended to take this medicine under the guidance of a doctor.