Chuanxiong Chajiao San has the effect of draining wind and relieving pain, and can treat headaches caused by external wind evils. Headaches are classified into cranio-cerebral lesions, extra-cranial lesions, and systemic diseases. The use of this product is prohibited for cranial lesions such as meningitis, cerebral hemorrhage, and high blood clots, because the headache caused by these diseases is not the headache caused by wind evil in Chinese medicine, which is similar to the headache caused by vasoconstriction in Western medicine or the headache caused by cold weather and rain. It contains Chuanxiong Ligusticum. It should not be taken at the same time as other western medicine for headache. If you are taking other medicine for headache, you need to stop taking it before using this product, and for headache caused by high blood pressure or other diseases, you should use this product under the guidance of herbalists.