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(Referring to smallpox)
For infantile macules and rashes, the world generally follows the treatment methods of Qian Yi (Qian Zhizheng), so there is no need to elaborate here. However, for conditions such as black blistering rashes and retracted/depressed lesions, ancient and modern physicians have not found the correct method. Those who mistakenly consider them as fire-toxin and use cold/cooling medicines to treat them rarely survive (less than one in ten). This is because foul blood reverses into the skin, stagnates and fails to circulate; if prolonged, it attacks the heart leading to death. The orthodox method of the Yellow Emperor involves using Pili Tang (Thunderbolt Decoction) and Jiangfu Tang (Ginger and Aconite Decoction). For any condition with a high mortality rate, employing this method often results in survival. Since the toxic blood has perished within the various meridians, there is absolutely no possibility of recovery. Only Fuzi (Aconiti Lateralis Radix Praeparata) possesses robust properties and swiftly traverses the twelve meridians; therefore, using it to attack the pathogen yields a survival rate of eight or nine out of ten. Applying moxibustion at the point one cun below the umbilicus (Shenque, CV8) for fifty moxa cones ensures complete safety. If cold medicines are used, causing the blood to congeal like ice, resulting in the whole body turning blue-black and death, this is the fault of the physician. Laypeople, upon encountering heat syndromes, invariably administer cold medicines; the heat is not cleared, yet the primordial qi is depleted. This approach is most detrimental. Whenever I encounter heat syndromes, I prescribe Zhi Mu (Anemarrhenae Rhizoma) five qian decocted and taken orally; the heat subsides immediately without damaging the primordial qi. This is my secret method. (The methods of Qian Yi are strictly adhered to by subsequent pediatricians, who differentiate organ syndromes based on the Five Elements and Five Colors, and categorize prognosis based on favorable/unfavorable and dangerous courses. The herbs used are merely mild and level, lacking uniqueness. While rebellious Yang-heat can indeed be saved, rebellious Yin-cold rarely recovers (one in a hundred). Although later Chen Shi claimed to have mastered the true method, saving only one or two out of ten, it does not compare to Mr. Dou's exposition, which elucidates ancient secrets and serves as the pivot for rescuing critical conditions. If pediatricians could follow this, premature deaths would naturally decrease. It is common to see that when laypeople encounter critical conditions, regardless of Yin or Yang, they claim it is "fire closure" and unceasingly use Shigao (Gypsum Fibrosum), Huanglian (Coptidis Rhizoma), and Dahuang (Rhei Radix et Rhizoma). People believe this and do not repent until death. Recently, with the publication of Fei Shi's *Jiu Pian Suoyan* (Brief Words on Correcting Deviations), quacks have adopted it as a model. Even when the syndrome and medicine match occasionally saving one or two, applying this method to Yin-cold syndromes has caused countless unjust victims.)

Infantile tidal fever occurring in the afternoon does not belong to deficiency syndromes; rather, it is caused by dietary injury to the Yangming Meridian. It must be accompanied by abdominal pain and vomiting/regurgitation. It is appropriate to use Laifu Dan (Reviving Elixir Pill) and Bichengqie San (Bi Cheng Qia Powder).