The efficacy and function of Fangfeng is to expel wind and relieve epidemics, dispel wind and dampness, relieve pain and spasm, in the dosage is 6~10g. used in raw form. Fangfeng is pungent, sweet and slightly warm, and belongs to the lung, bladder, liver and spleen meridians. Its main effects are to expel wind and relieve pain, expel dampness, antispasmodic and relieving itching. It can be used clinically for treating wind-cold flu, seen as fever, malignant cold (fear of cold), headache, body pain, and is usually used in conjunction with Jingwu, Qiangwu, and Angelica dahurica. It can also be used in the treatment of wind-cold-dampness paralysis (wind, cold, dampness three evils invade the body resulting in paralysis of the limbs), limb bone pain and other diseases, often with Qianghou, Duhuo, Xin Xin, etc.; can be used in the treatment of tetanus, seen in the teeth, limb convulsions, horny bow, etc., often with the whole scorpion, the southern star, the white aconite, etc.. In terms of dosage and usage, it is generally 6~10g, and the specific dosage needs to be adjusted by the Chinese medicine practitioner according to the patient’s own situation. It is contraindicated for patients with yin deficiency and fire exuberance (deficiency of yin and essence in the body and hyperactivity of deficiency fire), headache and blood deficiency.