The herb is the whole herb of the perennial plant Aristolochiaceae, used raw. It is also known as Xiao Xin and Shao Xin. The root of Xiao Xin is thin and has a very strong pungent taste, hence the name. Taste: Pungent, warm, with small poison. Attribution: To the lung, heart and kidney meridians. It is recorded in “Tangliu Ben Cao” as a meridian inducing medicine for the Kidney meridian of Shao Yin of the hand. Effects and Indications: First, dispelling wind, dispersing cold and relieving pain, treating headache, paralysis, abdominal pain and toothache. Dispersing cold and relieving symptoms, treating wind-cold superficial symptoms. Warming the lung and dissolving drinks, treating phlegm and coughing and asthma. Promoting orifices, treating nasal abscess, orifice closure and dizziness. Application: I. Pungent and strong, good at dispersing, warm in nature, can dispel cold, has the function of dispelling wind, dispersing cold and relieving pain, applicable to headache, paralysis, abdominal pain and other evidence caused by wind-cold and damp evil. It is often used in combination with Chuanxiong Ligusticum, Jingzhu, Fangfeng, Qiangwu and other wind dispersing herbs for the treatment of headache caused by wind-cold and dampness, and there are also Chinese patent preparations for clinical application. For the treatment of wind-cold and dampness, paralysis of the meridians and channels resulting in paralysis and lumbago, there is also the famous formula Duluxiang Yaisheng Tang. Secondly, fine pungent can dispel wind and dispel cold, also commonly used in external wind-cold evidence, to the cold evil, headache, limb pain is more suitable, commonly used formula Jiu Wei Qiang Wu Tang. There is also the treatment of Yang deficiency, external wind-cold, fever, body tiredness and desire to sleep, slippery tongue coating, sunken pulse, and ephedra, with the use of the “Theory of Typhoid”, the famous formula, ephedra and the phyllanthus phyllanthus soup. Third, pungent can warm the lung and phlegm, treatment of cold drinks in the lung, cough and asthma, sputum, often used with ephedra, ginger, Wu Wei Zi, see “Typhoid” formula Xiao Qing Long Tang, specifically for the treatment of cold drinks in the lung asthma evidence. Fourth, the pungent pungent scattering, good at the orifice, can open the nasal orifices, treatment of nasal abscess, the nasal orifice occlusion is not smooth, when the clear runny nose, can be used with Xin Yi, Angelica dahurica. It is also recorded in ancient prescriptions that for the treatment of stroke unconsciousness, the powder is taken and blown on the nose to awaken the mind and open the orifices. Usage and dosage: 2-5g for internal use in soup, 0.5g-2g for powder, appropriate amount for external use. Note for use: It is contraindicated in cases of Qi deficiency and excessive sweating, Yin deficiency and Yang hyperactivity in headache, Yin deficiency and lung heat in cough, etc. The dosage of the powder should not be too large.