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Luwen (Colloquially known as "Tupo Feng"), is caused by wind-warmth pathogen occasionally attacking the Shaoyang channel at one time, leading to disharmony of the collaterals. It occurs below the ear, either on the left side, on the right side, or simultaneously on both sides. In the early stage, it resembles a chicken egg, with white color and soft swelling, appearing as if there is pus, but pressing does not leave an indentation, feeling only soreness without pain, accompanied by slight aversion to cold and fever; in severe cases, there may be severe aversion to cold and high fever, dry mouth, and greasy tongue coating. At the initial stage, dispersing and resolving methods are suitable; if heat is severe, clearing and purging methods should be used immediately; if accompanied by rebellious Liver Yang, extinguishing wind and harmonizing methods should be employed. This condition will never form pus and can naturally dissipate after one period (approximately seven days).

Ergen Yong (Abscess at the Root of the Ear), in the early stage, has a firm and swollen base, with white color, occurring only on one side and never bilaterally, accompanied by aversion to cold and fever. At this time, dispersing and releasing methods should be used to scatter pathogens; sweating leads to resolution. If after seven days, body heat persists, pus formation is imminent, and Lingyangjiao San (Antelope Horn Decoction) is used for treatment. If there is alternating chills and fever without sweat, Xiaochaihu Tang (Minor Bupleurum Decoction) added with processed Jiangcan (Bombyx Batryticatus) and Jiaoci (Gleditsiae Spina) is used to attack and penetrate the toxin; once incised to drain pus, swelling subsides, heat recedes, and the patient stabilizes. Medication at this time must support Stomach Qi and harmonize Ying and Wei (Nutritive and Defensive Qi); blind use of tonifying and pushing-out methods is prohibited. This is because wind-warmth obstruction represents a state where Zheng Qi (Upright Qi) is strong and Xie Qi (Pathogenic Qi) is excess. Using Ren Shen (Ginseng Radix et Rhizoma), Dang Gui (Angelicae Sinensis Radix), and Bai Zhu (Atractylodis Macrocephalae Rhizoma) will inevitably cause Qi and Blood stagnation, dulling Spleen and Stomach function, resulting in unclear pus, prolonged course, and delayed wound healing. Generally, accidental contraction of wind-warmth constitutes a Yang Excess pattern, with strong Zheng Qi and excess Xie Qi. Once pus drains and pathogens retreat, Ying and Wei naturally harmonize, leading to recovery. Using Ren Shen to tonify and support upright Qi will instead cause harm; this point must be understood, and students should infer similar principles from this. If residual pathogens remain uneliminated after an epidemic disease, abscesses may also form in the area of Ergen Fayi; the treatment method is the same as described above.

Fayi (Mumps-like Swelling), results from incomplete sweating or purgation in Shanghan (Cold Damage) diseases, leaving residual heat toxins unremoved, with pathogens knotting above the cheeks and jaw, causing hard swelling and pain before and behind both ears. Early symptoms include fever and thirst; Linqiao Baidu San (Forsythia Detoxification Powder) should be used to clear heat and detoxify, or Puji Xiaodu Yin (Universal Benefit Toxin-Resolving Decoction) is also acceptable. If Zheng Qi is deficient while Xie Qi is excess, with depletion of fluids and dryness, constipation, confused consciousness, and wiry and stiff pulse, Xijiao Dihuang Tang (Rhino Horn and Rehmannia Decoction) added with Xi Huang (Bezoar), Danning (Arisaematis Cum Bile) and Zhuli (Bambusa Textilis Sap) is the primary treatment. Additionally, damp-warmth pathogens, latent warm malaria, or warm toxic plague, even after sweating, if residual pathogens remain and enter the Shaoyang channel, manifesting as Fayi, present with persistent chills and fever, white greasy tongue coating, either hard stools or diarrhea with heat. Xixin Tang (Gastrodia and Uncaria Decoction combined with Warming Gallbladder Decoction) or Gegen Qinlian Tang (Kudzu and Coptis Decoction) should be used. If chills and fever persist, and the affected area shows red, swollen, bright skin with ulceration, the balance between pathogen and resistance indicates pus formation. After rupture, sudden use of tonifying and pushing-out methods is contraindicated; supporting Stomach Qi and harmonizing Ying and Wei is appropriate, with Sheng Gao (Rising Paste) applied externally. If pus does not drain externally, Sheng Yao Line (Arsenic-containing Extract Thread) is used to promote drainage.

Wandou Chuang (Smallpox), also occurs due to incomplete elimination of residual toxins after sweating or purgation in Shanghan, manifesting after recovery. Treatment involves decocting and administering herbs such as Huanglian (Coptidis Rhizoma), Gancao (Licorice Root), Guiwei (Angelicae Sinensis Radix Tail), Honghua (Carthami Flos), Fangfeng (Saposhnikoviae Radix), Kushen (Sophorae Flavescentis Radix), Jingjie (Schizonepetae Herba), Linqiao (Forsythiae Fructus), Qianghuo (Notopterygii Rhizoma et Radix), and Baizhi (Angelicae Dahuricae Radix). Externally, Mangxiao (Natrii Sulfas), Chixiaodou (Adzuki Bean), and Qingdai (Indigo Naturalis) are powdered, mixed with Jizi Qing (Egg White) and Zhudanhan (Porcine Bile), and applied to the sores for best effect. Do not disturb the scabs; wait for them to fall off naturally without leaving scars.