Chaihu has the effect of elevating yang qi, evacuating and reducing fever, and relieving the liver of depression (treating depression by unblocking the liver’s qi). Chaihu is usually taken internally in a decoction, and the effect of brewing water as a substitute for tea is limited, and it cannot be used as a substitute for medication in treating diseases. The Chinese medicine Chaihu is made from the dried roots of the plant Chaihu. It is pungent, bitter and slightly cold in nature, and can enter the lung, liver and gallbladder meridians, with the effect of elevating yang qi, evacuating and reducing fever, and relieving the liver of depression (treating depression by unblocking the qi of the liver). It can be used clinically to treat distension and pain in the chest and ribs, cold and heat (the body is hot and cold at the same time), cold and fever, uterine prolapse, irregular menstruation, prolapse of the anus, etc. It is usually taken in decoction. Chai Hu is usually taken internally in decoction, and raw products are preferred to reduce fever. Vinegar products are preferred to relieve the liver and depression. The adverse effects of Chai Hu are not clear, and it is not suitable for those with yin deficiency and hyperactivity of yang (deficiency of yin fluid and hyperactivity of yang), internal movement of liver wind, yin deficiency and hyperactivity of yin (deficiency of yin essence in the body and hyperactivity of deficiency and fire), or those who are rebellious to the qi. The effect of Chai Hu brewed water as tea is limited and cannot replace the medicine. Please take it under the guidance of a Chinese medicine practitioner for evidence-based treatment, and not blindly on your own to avoid damage. If there is any discomfort, please consult a doctor promptly.