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The lesion is located at the Huantiao acupoint (GB30), also known as Suojue Ju (Shrinking-Leg Abscess). The skin color remains unchanged, but the area is swollen, hard, and painful. Externally, apply a paste made by crushing Baijiezi (Brassicae Semen Album) into powder and mixing it with fermented rice wine; alternatively, mix powders of Daji (Euphorbiae Pekinensis Radix) and Gansui (Kansui Radix) with white honey for application. Internally, administer Yanghe Tang (Warming Harmony Decoction), one dose daily; after four to five doses, the swelling may resolve. Once resolved, continue administering Zilong Wan (Dragon Pill) or Xiao Jindan (Little Golden Pill) to prevent recurrence. Incision and drainage are strictly contraindicated; cutting will inevitably lead to permanent leg disability (Suojue Sunji).

Ma Yuanyi commented: Using Yanghe Tang for Tiegu Ju (Bone-Adhering Abscess) is correct and worthy of emulation.

The lesion is located between the inner cheek and the tooth roots, presenting without swelling or redness, with pain radiating to the facial bones, resembling Tiegu Ju. If treated as a typical carbuncle (Yong), it will cause harm. In the early stage, it is easily misdiagnosed as toothache. Overconsumption of Shengdi (Rehmanniae Radix) and Shigao (Gypsum Fibrosum) can exacerbate the condition, leading to rotting of the tooth roots and spreading to the throat, which becomes incurable. Treatment should involve decocting Erchen Tang (Two-Cured Decoction) with Yanghe Wan (Harmony Pill), or using Yanghe Tang to dissipate the lesion. If ulceration has occurred, alternate between Yanghe Tang and Xihuang Wan (Rhino Horn Pill) morning and evening. If necrotic bone fragments are present, blow Tuiche San (Cart-Pushing Powder) into the wound; after one night, the bone will cease to hurt and fall out spontaneously. If no bone falls out by the next day, apply Shengji San (Flesh-Generating Powder) and internally administer Baoyuan Tang (Preserve Origin Decoction) supplemented with Rougui (Cinnamomi Cortex), Danggui (Angelicae Sinensis Radix), and Chuanxiong (Ligustici Chuanxiong Rhizoma). Use raw Gancao (Glycyrrhizae Radix et Rhizoma) until healing is complete.

Ma Yuanyi commented: Gucaofeng (Bone-Trench Wind) arises at the jaw joint opening and closing point, specifically the Jiache acupoint (ST6). If the area feels hard and adherent to the bone without heat upon palpation, Yanghe Tang may be administered.

Large nodules are called Ehe (Malignant Nuclei), while small ones are called Tanhe (Phlegm Nuclei); their initial presentation is identical to Shiju (Stone Abscess). However, the cold coagulation is severe and dense, with deep-rooted toxicity, making them extremely difficult to soften and mature. Before ulceration, cooling plasters and cooling internal medicines are contraindicated. Only internal administration of Yanghe Tang and Xihuang Wan can resolve the condition. Some practitioners use crushed large pond snails applied topically to dissipate the swelling. Incision is strictly forbidden; cutting leads to everted, flower-like granulations (Fan Hua Qi Gang). One method involves using a large toad: slit its abdomen, puncture several holes, and apply the whole toad (skin-side down) over the lesion to draw out toxicity and soften the induration. Internally, administer warming, tonifying, and detoxifying formulas that expel toxins and resolve phlegm; Xihuang Wan is sufficient for recovery. Note: For pregnant women, Xihuang Wan is contraindicated due to the presence of Shexiang (Moschus).

Ma Yuanyi commented: Ehe is difficult to ulcerate and heal; even medication often yields poor results. Strictly avoiding incision is indeed a profound truth.