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The method of "Tuo" (Supporting/Promoting) means to lift and support. When carbuncles and toxins manifest from the exterior to the interior or from the interior to the exterior, pathogenic factors inevitably attack the interior; this is a natural principle. In such cases, one should employ *Tuoli Tangye* (Decoction for Supporting the Interior), adding *Shengma* (Cimicifugae Rhizoma) and *Yinhuahua* (Lonicerae Japonicae Flos) to facilitate the circulation of Ying and Wei (Nutritive and Defensive Qi), harmonize the blood vessels, and dissipate the toxin. Hence it is said that in treating sores and ulcers, there is not a single day when supporting the interior is omitted.

The term "Bu" (Tonifying/Supplementing) refers to the method of treating deficiency syndromes. The Classics state: "Deficiency should be tonified." For example, for Qi deficiency, use *Sijunzi Tang* (Four Gentlemen Decoction), composed of *Renshen* (Ginseng Radix), *Huangqi* (Astragali Radix), *Baizhu* (Atractylodis Macrocephalae Rhizoma), and *Gancao* (Glycyrrhizae Radix et Rhizoma). For Blood deficiency, use *Siwu Tang* (Four Substances Decoction), composed of *Danggui* (Angelicae Sinensis Radix), *Chuanxiong* (Chuanxiong Rhizoma), *Shaoyao* (Paeoniae Radix), and *Dihuang* (Rehmanniae Radix). Combining these two formulas yields *Bawu Tang* (Eight Substances Decoction), or they can be processed into *Bazhen Wan* (Eight Treasures Pill). Depending on cold or heat symptoms, *Huanglian* (Coptidis Rhizoma) or *Fuzi* (Aconiti Lateralis Radix Praeparata) may be added, with flexible modifications based on specific conditions. The efficacy lies essentially within these two formulas. Naturally, muscles will grow, flesh will regenerate, Qi and Blood will harmonize, and the body will become strong.

Regarding carbuncles (*Yong*), deep abscesses (*Ju*), hard boils (*Ding*), toxins, scrofula (*Luoli*), tumors (*Liu*), and furuncles (*Jie*), the names are numerous. Therefore, I generally refer to them collectively as "Chuanyang" (Sores and Ulcers). However, each has its own morphology; their shapes differ, and the suffering varies. This depends on the location along the fourteen meridians, the abundance or scarcity of Qi and Blood, the severity of the syndrome, the size and depth of the sore, the source organ involved, and the degree of pathogenic invasion. Thus, there are differences between Yin and Yang, Exterior and Interior, Biao (Branch/Symptom) and Ben (Root/Etiology). The Classics state: "All pain, itching, sores, and ulcers belong to Heart Fire." It also states: "When Ying Qi does not flow smoothly and reverses into the muscle tissue, carbuncles and swellings arise." A large, floating swelling is a *Yong* (Carbuncle), generated by accumulated toxins in the Six Fu Organs. Initially presenting with a head, resembling a millet grain, white and scorched, where touching causes pain piercing the heart, is a *Ju* (Deep Abscess). A swelling that is superficial, with a small root, reaching no more than two or three cun in diameter, is a *Jie* (Furuncle). As for *Ding* (Hard Boils), there are twenty-three forms; I currently classify them into thirty-four types. They are named so because their shape is small with a pointed top like a nail. If red threads extend directly to the heart, the head should be pricked to drain toxic blood, and substances like *Chansu* (Bufonis Venenum) should be applied. If not pricked, the toxin returning to the heart will certainly cause death. However, for initial *Yong* and *Jie*, moxibustion is suitable because their pathogenic Qi is superficial; moxibustion allows Qi and Blood to circulate freely. *Yong* is easy to treat but difficult to heal completely, often lingering; *Ju* is difficult to treat but easier to cure. *Ju* is suitable for cauterization rather than moxibustion. Among all sores, only *Dingchuang* (Hard Boil Sores) and *Fabei* (Back Carbuncle) are the most fierce. One must understand the principles of "Five Auspicious Signs" and "Seven Ominous Signs," referring to the previous discussions. Every chapter contains profound meaning, every volume reveals unique insights. Although this concerns surgery, the ancients had not exhausted its mysteries nor fully transmitted its teachings. Though I am not talented, I have detailed the subtle principles extensively, from major carbuncles and abscesses down to minor acne and miliaria, selecting only the most refined and secret methods. All prescriptions are chosen for their proven efficacy. Hence the book is titled *Waike Qixuan* (Enlightenment on External Medicine). Furthermore, diagrams of morphologies and symptoms are provided, meridian pathways are explained, and treatment methods are applied, so that future students may grasp the essentials at a glance and establish high aspirations.