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Question: Some say that Shanghan (Cold Damage) is a "Hengbing" (sudden/catastrophic disease). Why is this so? Sun Simiao said that laypeople call it Hengbing, mostly failing to understand how to treat it. They all claim it will heal itself after a certain number of days, which leads to premature death in the majority of cases worldwide. Whenever one first feels unwell, immediate treatment is required. Until recovery, decoctions should be administered continuously to reduce toxic heat, leading to natural healing. One must never allow pathogenic qi to remain unchecked and attack the body indiscriminately, waiting passively for death.

Question: What happens if diseases are not treated in time? Zhang Zhongjing said: When a person falls ill, if it is not treated promptly, enduring the pain and hoping for spontaneous recovery will result in chronic, stubborn diseases. This is especially severe in children and women. If the seasonal qi is discordant, early diagnosis and treatment are necessary. By tracing the origin of the pathogen while it is still in the Couli (interstitial spaces between skin and muscles), timely treatment rarely fails to achieve a cure. If patients endure their suffering and only speak up after several days, the pathogen has already entered the Zang organs (internal organs), making it difficult to control. This is the key precaution for families when illness strikes. (The *Waitai Miyao* cites the *Qianjin Fang*, stating: It is difficult to control; even masters like Bian Que or Cang Gong would be powerless. Conditions such as carbuncles, ulcers, and furuncles are particularly urgent; this is essential for self-care.)

Question: How should decoction therapy be conducted? Zhang Zhongjing said: When preparing decoctions, one should not avoid morning or night hours. As soon as illness is perceived, treatment should begin immediately, without waiting for specific times, facilitating easier recovery. If treatment is delayed, the disease may progress and transform. Even if one wishes to eliminate the pathogen, it will be difficult to exert force effectively. If medication is taken contrary to proper methods or arbitrarily disobeying medical advice, further treatment is futile.

Question: What is the appropriate regimen for taking decoctions? Zhang Zhongjing said: For inducing sweating, warm decoctions should be used. Although the prescription states three doses per day, if the condition is severe and unresolved, the interval between doses should be shortened, allowing all three doses to be consumed within half a day. If the medicinal action encounters resistance from the pathogen, the patient will feel changes. For severe conditions, observation should be continuous throughout day and night. If one dose is completed and symptoms persist, the original decoction should be prepared again. In some cases where sweating does not occur initially, three doses may be required for resolution. If no sweat occurs at all, it indicates a fatal condition. (Later, Chen Linqiu's steaming method for inducing sweat is described.)

Question: Are there regional variations in the suitability of taking decoctions? Wang Shuhe said: The land varies in warmth and coolness, and terrain differs in height and depth. Medicinal properties vary in rigidity and softness, and dietary habits and living arrangements also differ. Therefore, the Yellow Emperor raised questions regarding the four directions, and Qibo demonstrated the abilities of four distinct treatments, instructing later generations and enlightening those who had not yet understood. Physicians facing illness should carefully examine both aspects.