The effects of Chai Hu are dispersing and relieving fever, relieving the liver of depression (treating depression by unblocking the liver’s qi), and elevating yang qi. It is used in treating colds and fevers, cold and heat, distension and pain in the chest and ribs, and prolapse of the anus. Chai Hu is pungent and bitter, slightly cold and fever-reducing, and is good at dispelling evils, relieving the exterior of the body and evacuating evils that are half-expression and half-rippling in the Shao Yang. It is good for treating wind-cold flu, fever, headache and body pain, often combined with Fangfeng and Ginger, etc. If wind-cold is detected externally and the cold enters into the interior and turns into heat, the cold becomes lighter and the body heat becomes more prevalent, it is often combined with Pueraria lobata and Qiangwu. Chai Hu (柴胡) is pungent, bitter and excrete, good at regulating liver qi, dredging the liver and relieving depression. It is often used together with Xiang Fu, Chuan Xiong and Bai Shao to treat symptoms such as distension and pain in the chest, abdomen and lower abdomen caused by the liver’s failure of detachment (abnormal function of the liver’s detachment) and obstruction of qi, depression, menstrual disorders and dysmenorrhea in women. Chai Hu can elevate the clear yang qi of the spleen and stomach, which can treat the deficiency of middle qi (weak spleen and stomach qi), the heavy fall of the epigastrium (abdomen) caused by qi deficiency and subsidence, poor appetite and tiredness, prolonged diarrhea and prolapse of the anus, kidney ptosis and other organ prolapse, and it is often combined with ginseng and astragali to replenish the qi and elevate yang qi (replenish qi to make the yang qi elevated and developed). It should be noted that this drug has the property of elevation, so it is contraindicated in cases of yin deficiency and fire (deficiency of yin essence in the body, resulting in hyperactive fire), hyperactivity of liver yang (hyperactivity of liver yang, resulting in symptoms such as dizziness, dizziness, and headache), and qi upward reversal. If you need to take this medicine, it is recommended to do so under the guidance of a doctor.