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Wind-cold injury (Shang Feng) is originally caused by external pathogenic factors. However, if the pathogen is severe and deep, spreading throughout the meridians, it transforms into Cold Damage (Shang Han); if the pathogen is mild and superficial, affecting only the skin and hair, it is termed Wind-cold injury (Shang Feng). The skin and hair are associated with the Lung and connect upward to the nose; therefore, when the pathology is at the exterior, symptoms such as nasal congestion and heavy voice occur. In severe cases, it may involve the Shaoyang and Yangming meridians, leading to headache, aversion to cold, or fever. Internally, it mostly manifests as coughing; in extreme cases, pathogenic excess in the Lung leads to phlegm production or wheezing. When cold predominates and wind is contracted, the body will likely have no sweat and frequent coughing, due to Yin pathogens closing and stagnating the skin and hair. When heat predominates and wind is contracted, the body will likely have excessive sweating, aversion to wind, and coughing, due to Yang pathogens opening and draining the muscle interstices. Those with strong Qi, even if presenting with phlegm and cough, may recover after five to six days or more than ten days, as the Lung Qi unblocks, stubborn phlegm is cleared, and wind pathogens gradually disperse. Those with weak Qi find it difficult to resolve the pathogen, with phlegm and cough worsening daily, potentially lingering for months while wind pathogens remain; without acrid-warm herbs, dispersion is impossible. For those suffering from weakness due to aging who neglect daily care, old pathogens may not be expelled before new ones arrive, often resulting in lifelong affliction, making treatment particularly difficult. Generally, when wind pathogens injure the person, they enter through the area behind the shoulders and at the root of the neck—specifically Dazhu (BL11), Fengmen (BL12), and Feishu (BL13)—reaching the Lung via the shortest and most direct route. Tenderness upon pressure indicates this pathway. Therefore, individuals with weak constitutions or declining Qi and Blood after middle age are prone to invasion; by carefully protecting these areas, keeping them slightly warm during daytime sitting, or covering them tightly with silk garments at night to prevent slight chilling, one can avoid lifelong issues of wind-cold injury and coughing. This is a method I have personally verified as effective, recorded here to advise those who cherish their health and share similar principles.

For wind-cold injury with cough, abundant phlegm, or wheezing and nausea, Liu'an Decoction (Liu'an Jian) modified is most appropriate; Erchen Tang (Two-Cured Decoction) with added fresh ginger is also suitable. If external cold-dwindle causes cough with abundant phlegm and wheezing, accompanied by Yin deficiency and insufficient Qi and Blood, where phlegm is inactive and Qi is deficient, lacking the strength to expel pathogens, Jinshui Liujun Decoction (Jinshui Liujun Jian) is indicated, with miraculous efficacy. It is especially suitable for the elderly with weak stomachs. For wind-cold injury combined with cold, causing cough and fever, Chaichen Decoction (Chai Chen Jian) is appropriate. For epidemic wind pathogens in the Lung, causing cough, wheezing, abundant phlegm, with severe Yin-cold and difficulty resolving pathogens, Xiao Qinglong Tang (Minor Blue Dragon Decoction), Xiaofeng Baijie San (Wind-Dispersing Hundred-Release Powder), or Jinfeicao San (Boiling Grass Powder) are suitable. For initial wind-cold injury with alternating chills and fever, thick sticky nasal discharge and sputum, chest discomfort, and cough with abundant phlegm, Shenru Yin (Ginseng and Perilla Infusion) is indicated. For wind-cold injury with headache, nasal congestion, heavy voice, and cough, Shenzhu San (Divine Efficacy Powder) from *Ju Fang* or Chuanxiong Chatiao San (Ligusticum Tea-Regulating Powder) are appropriate. For wind-pathogen combined with dampness, causing unclear head and eyes, nasal congestion, and heavy voice, Chonghe San (Harmonizing Powder) is suitable. For external closure by wind-cold, painful limbs and joints, nasal congestion, heavy voice, and internal latent fire, Qianghuo San (Notopterygium Powder) from *Ju Fang* is indicated. For Taiyang meridian wind-cold injury with fever, spontaneous sweating, and aversion to wind, Guizhi Tang (Cinnamon Twig Decoction) is appropriate.