Yuan Hu infusion has some efficacy in activating blood circulation, promoting qi circulation and relieving pain, but the effect is limited. Yuan Hu, also known as Yan Hu Suo, is pungent, bitter and warm in nature, belonging to the liver and spleen meridians, and has the efficacy of activating blood circulation, promoting qi circulation and relieving pain. It is mainly used for pain in the chest and ribs, epigastric (abdominal) pain, chest paralysis (chest tightness and pain), cardiac pain, menstrual dysmenorrhea, post-partum stasis, and pain in bruises and swellings. Oral administration of Yuan Hu may have adverse reactions such as dizziness, fatigue, nausea, etc.; overdose may result in poor appetite, abdominal pain, abdominal distension, drowsiness, etc., which can be recovered by stopping the medicine. If the above symptoms occur, the drug should be stopped immediately, and in serious cases, consult a doctor promptly. Any external wind-heat or warm-heat, internal fire-heat, yin deficiency and fire (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire), qi deficiency, blood deficiency, qi and blood deficiency or yin deficiency and blood-heat should not be taken in large quantities of a single medicine, and it is not suitable for the elderly, infants and young children to use it for a long period of time, and should be used with caution in cases of excessive menstruation and blood deficiency with no blood stasis. It is prohibited for pregnant women. It should be noted that soaking in water does not allow the active ingredients of Yuan Hu to be completely precipitated, so its efficacy is limited, so it cannot be used as a substitute for medication. Yuan Hu should be used under the guidance of a physician to identify and treat the symptoms, and if necessary, with other drugs, do not take it on your own, so as not to delay the condition, resulting in adverse consequences.