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Scholar Xu Shuwei stated: "One who can treat *Shanghan* (Cold Damage) can certainly treat *Douzhen* (Smallpox/Chickenpox); one who can treat *Douzhen* can certainly treat *Yongdu* (Carbuncles and Toxins)." This is because one who can treat *Shanghan* understands the principles of exterior and interior, yin and yang, cold and heat, qi and blood, as well as the excess and deficiency of pathogenic factors and healthy qi. The pathogen of *Shanghan* moves from the exterior to the interior; the toxin of *Douzhen* moves from the interior to the exterior. As for *Yongdu*, some cases are caused by external invasion of wind-cold, summer-heat, and dampness, while others are caused by internal injury due to emotional disturbances or improper diet. Therefore, in treating *Shanghan*, *Douzhen*, and *Yongdu*, one must examine the conditions of exterior/interior and excess/deficiency to determine the treatment. For instance, in *Douzhen* cases presenting with exterior excess, one should clear and release the exterior; in cases of interior excess, one should unblock and purgatively drain the interior; if there is heat in the blood, cool the blood; if qi is rebellious, regulate qi; if pathogenic toxins are flourishing, urgently employ methods to clear heat and detoxify; if healthy qi is deficient, one should simultaneously tonify healthy qi. If qi is deficient, tonify qi; if blood is deficient, tonify blood; if the exterior is deficient, consolidate the exterior; if the interior is deficient, strengthen the interior. Thus, there are formulas for cold, heat, warmth, and cooling in treating *Douzhen*, and methods involving releasing, tonifying, purging, and draining. "Purging" refers to purging heat toxins, while "tonifying" refers to supplementing deficiencies of healthy qi. In the past, Qian Yi's formulas for *Douzhen* mostly used cooling substances, asserting that clearing heat toxins was essential. Chen Wenzhong exclusively used warming and tonifying methods, arguing that only when qi and blood are sufficient can toxins be transformed into pus. These views are all biased and fail to grasp the orthodox middle way. Therefore, pediatricians should strike a balance between the approaches of these two masters, examining the nature of pathogens and healthy qi to treat patients, thereby ensuring no errors. Regarding *Yongdu* conditions, they are no different from *Douzhen*, and the treatment methods are also identical. For example, yin toxins that remain internal and fail to erupt correspond to the sinking inward of *Douzhen* toxins; a lesion base that is gathered and high corresponds to the distinct boundaries and swelling of *Douzhen*; thick pus corresponds to the dense fluid of *Douzhen*; absence of pus corresponds to the failure of *Douzhen* toxins to transform; ability to eat corresponds to toxins fully expressing outwardly; inability to eat corresponds to toxic vapors still stagnating internally; wound closure corresponds to scabbing of *Douzhen*; foul rotting corresponds to the ulceration and failure to heal of *Douzhen*. Whether employing releasing, attacking, tonifying, or purging methods, one should apply the same principles used for treating *Douzhen*. Historically, surgeons have generally believed that pain, itching, sores, and ulcers all belong to fire, relying solely on cold and cooling herbs. Consequently, toxins may become frozen and fail to erupt, or continuous use of purgative and draining drugs may lead to collapse of healthy qi, resulting in untreatable conditions. Alas! Pediatricians and surgeons who devote themselves to studying the *Lingshu* (Spiritual Pivot), *Suwen* (Basic Questions), and the works of Zhang Zhongjing will accrue immeasurable merit.