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Pang stated: Tianxing Wandou Chuang (Smallpox) was not recorded by practitioners of Jingfang (Classical Prescriptions) before the Han and Wei dynasties. It is said that it was first obtained by the Zhenglu General of Nanyang during the Jianwu era, hence still called "Lu Chuang" (Barbarian Sores). Later, famous physicians did record the manifestation of macules (Fa Ban), attributing it to heat toxins failing to dissipate after sweating, vomiting, or purging therapies, resulting in exterior deficiency and interior excess. The hot qi becomes dry and excessive on the exterior, causing macules to appear on the body. Another view holds that Wandou Chuang also involves exterior deficiency and interior excess, following the same principle as Fa Ban. Yet another theory states that when internal heat toxins are abundant, they attack the Zang-Fu organs, while residual pathogens flow into the muscles, eventually forming sores within the skin pores. Since this condition constitutes interior excess and abundant internal heat toxins, purgative methods should be employed both before onset and when onset is imminent but macules have not yet appeared; even after the sores have healed, a second purgation may be indicated to clear residual heat. This disease has two types. One is Fa Ban, commonly known as Mazi (Measles), which carries a lighter toxicity. The other is Wandou (Smallpox), which carries the heaviest toxicity and often results from abnormal winter warmth. Whenever one perceives unseasonable warmth during winter, and before the sore toxins manifest, purgative methods should be applied according to protocol, followed sequentially by preventive medications, thereby eliminating the toxic factors internally and preventing recurrence. Cases occurring spontaneously in any season without prior winter warmth should also be treated with purgatives. Although ancient prescriptions contained treatment methods, they were not detailed, possibly because the heat toxicity was less severe at that time, resulting in few deaths. In recent times, however, this disease occurs annually. Severe cases result in death for five to six out of ten people. While some die due to irreversible internal damage from toxins, more than half are attributed to medical errors. If a patient suffers from body pain, high fever, and headache, how can the pathogen subside without mild diaphoresis? If there is prolonged constipation, toxin attacking the waist and hypochondrium, or abdominal distension and fullness, how can these be resolved without mild laxation? Therefore, one must carefully consider the use of diaphoretic and purgative methods. Cold-natured herbs should certainly not be used indiscriminately, as warm-natured herbs may exacerbate heat toxins. However, if the heat syndrome is intense and the pulse is surging and rapid, cold-natured herbs that do not obstruct the Qi movement between the exterior and interior may be used generally. Conversely, if cold pathogens cause obstruction and the pulse is floating and slow, warm-natured herbs that do not obstruct Qi movement may be expected to resolve the condition like melting ice. Those who claim that diaphoresis, purgation, and cold/heat-modulating drugs are contraindicated, suggesting only Radix Arnebiae (Zicao) alone should be used, represent a narrow-minded school of thought. They succeed only because they encounter mild diseases where spontaneous recovery is possible; faced with severe illness, they would simply fold their hands and await death. Some nobles, confident in themselves and disregarding professional advice, criticize doctors for errors if treatments involving diaphoresis, purgation, or temperature regulation fail to save the patient, a situation worthy of lament. Just as a lute player must adjust the bridges to tune the instrument, I have adapted ancient formulas and added my own insights to create prescriptions for Ban Dou Chuang. Since children are most susceptible to this affliction, small decoction dosages are specified, which adults may double.