Cang Er Zi San is composed of Xin Yi, Cang Er Zi, Angelica dahurica and Mentha piperita. Cang Er Zi San is composed of Xin Yi, Cang Er Zi, Angelica dahurica and Mentha dahurica. This formula has the effect of relieving wind and pain, and clearing the nasal orifices. This formula has the effect of dispersing wind, relieving pain and clearing nasal orifices. Xin Yi and Cang Er Zi can clear nasal orifices, while Angelica Dahurica and Mentha can disperse wind-heat. This formula is often used in the treatment of nasal congestion, runny nose, inability to recognize fragrance and odor, frontal headache, etc. caused by wind attacking the head and face. It should be noted that Cang Er Zi San contains Cang Er Zi with certain toxicity, overdose may lead to poisoning. If there is a need for medication, it is recommended to go to the hospital and use the medication under the guidance of a doctor, do not use the medication on your own, so as to avoid delaying the condition.