Zhengqi Shui, or Pouli Xiang Zhengqi Shui, has an instruction for use by mouth, so external use does not fulfill its efficacy role. The main function of Huo Xiang Zheng Qi Shui is to relieve the surface of dampness (to relieve the evil of external infection and get rid of the dampness in the body), regulate the qi and the middle (to regulate the qi of the spleen and stomach, so that the function of the spleen and stomach is smooth), and can be used for colds and flu caused by wind-cold and summer-dampness, which can be seen in the plumping in the chest and the diaphragm, the distension of the epigastric region, the headache, vomiting and diarrhea, etc. But Huo Xiang Zheng Qi Shui is taken orally to play its role, so external use cannot play its effect. However, Huo Xiang Zheng Qi Shui works by taking it orally, and external application does not exert its effective effect. During the period of taking Huo Xiang Zheng Qi Shui, avoid cold and cold, tobacco and alcohol, as well as spicy and greasy food, and should not be taken at the same time tonic Chinese medicine, alcohol allergy is prohibited, allergic people should be careful to use, its adverse reactions are nausea, vomiting, skin rash, itching, dizziness, flushing, palpitations (heartbeat accelerated, often accompanied by heartburn), and so on. It is recommended to take patchouli under the guidance of a doctor.