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(The pathogenic factor) accumulates in the sinews and collaterals, and coagulates in the skin. Since there are many affected areas, it is difficult to treat from the interior; therefore, external treatment is appropriate.

Acupuncture (Zhen Fa), Moxibustion (Jiu Fa), Burning (Shao Fa), Fumigation and Washing (Xun Xi Fa), Ulceration/Putrefaction (Lan Fa), Application/Poultice (Fu Fa).

In ancient times, this disease was called "Li Feng" (Leprosy/Madness), also known as "E Ji" (Vile Disease). Black and white leprosy (Hei Bai Lai), red and white vitiligo-like patches (Chi Bai Dian) all belong to this category. However, cases of numbness in Lai/Dian are few, whereas Feng invariably presents with numbness. Danxi stated: "Ma" (numbness/tingling) feels merely like a slight breeze, still retaining the sensation of Qi and Blood rushing; "Mu" (wooden/insensate) indicates that Qi and Blood have become bi-occluded and insensate, unaware of pain or itching. When Li Feng first begins, the hands and feet must first become numb, followed by damage and ulceration of the skin. The *Ling Shu* states: "When Wei Qi fails to circulate, it results in numbness." The *Su Wen* states: "When Ying Qi is deficient, there is insensibility (Bu Ren); when Wei Qi is deficient, there is paralysis/inability to move (Bu Yong). When both Ying and Wei Qi are deficient, there is both insensibility and inability to move." Furthermore, the *Su Wen: Mai Yao Jing Wei Lun* mentions: "Pulse changes due to Wind constitute Li Feng." It also states: "When Cold and Wind pathogens lodge in the vessels and do not depart, it is named Li Feng." The pathology of Li Feng involves heat in Ying and Wei Qi, resulting in turbid Qi. Xue Shi further believed this was caused by external pathogens invading, with Wei Qi lying dormant internally; long-standing Damp-Heat causes Blood to transform with Fire. Therefore, treatment should primarily focus on Cooling Blood and Harmonizing Blood, assisted by expelling Wind and removing Dampness, using channel-guiding herbs as messengers, and slightly adding Heat-clearing and Toxin-resolving agents. There is no case that will not be completely cured. However, one must distinguish between severity and internal/external aspects for treatment.

This represents the flexible methods within the Feng Men school. Once comprehended, prescriptions can be modified according to syndromes, yielding spring-like vitality upon application. If one sticks rigidly to formulas without adaptation, one loses the original intent of prescription formulation.

Herbal Ingredients: Feng Zi Rou, Chi Shao Yao (Radix Paeoniae Rubra), Xiang Du Huo, Bai Xian Pi, Jin Yin Hua, Hu Ma Ren, Tu Ma Ren (i.e., Huo Ma Ren/Radix Cannabis Sativae), Bai Ji Li, Tiao Huang Qin, Bai Ku Shen, Bei Fang Feng, Bo He Ye, Wei Ling Xian, Zhi Zi Ren, Dang Gui Wei, Chuan Huang Lian, Zhen Qi She, Chuan Qiang Huo, Bai Jiang Can, Ming Tian Ma, Da Chuan Wu, Jing Jie Sui, Nong Huang Bo, Hei Xuan Shen, Lao Zhi Ke, Zhe Bai Zhu, Piao Cang Zhu, Da Qin Jiao, Xiang Bai Zhi, Zhen Chuan Xiong, Jin Da Huang, Xian Hong Hua, Mu Dan Pi. Note: Hong Zao Pi (Red Date Skin) and Suan Zao Pi (Sour Jujube Kernel Skin) both refer to Shan Yu Rou (Fructus Corni).