Yuan Hu is an essential herb for promoting blood circulation and qi circulation to relieve pain (relieving pain by regulating the body’s qi), and also treats pain in the chest (a collective term for the chest and ribcage area), epigastric (abdomen) area, menstrual cramps and dysmenorrhea, and stagnation of qi and blood. Yuan Hu, also known as Yan Hu Suo or Yuan Hu Suo, belongs to the Liver, Spleen and Heart meridians and is pungent, bitter and warm in nature. It has the effects of relieving pain, invigorating blood circulation and promoting circulation of Qi. It can be used to treat pain in the chest, hypochondrium and abdomen, dysmenorrhea due to menstrual closure, stagnation of qi and blood, post-partum stasis, chest paralysis (stuffy pain in the chest), cardiac pain, and swelling and pain in falling and thumping, etc. It can be widely used in the clinic for pains in various parts of the body due to blood stasis and stagnation of qi. This product is often combined with Neem Zizi to treat chest, hypochondrium and abdominal pain caused by liver stagnation (poor transportation of qi and blood in the liver and emotional depression) and blood stasis. This product is prohibited for pregnant women, and should be taken with caution by those who are physically weak. Adverse reactions are still unclear, and it is recommended to use the drug under the guidance of a professional doctor’s diagnosis.