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The throat region is particularly prone to acute conditions. (The pharynx, larynx, epipharynx, and epiglottis serve as the pathways for food and breath; if any one of these four is compromised, it leads to the cessation of eating and breathing, resulting in death. If the condition involves internal True Cold (Zhen Han), treatment should employ the method of guiding fire back to its source (Yin Huo Gui Yuan), such as using formulas like Guizhi Jiangtang Decoction or Guiyuan Dan.) Pain that escalates gradually with swelling and heat indicates a Heat Disease (Re Bing). (Heat diseases refer to Wind-Heat (Feng Re). Wind without Heat does not become intense, and Heat without Wind does not blaze; treatment should focus on dispersing Wind and descending Fire, such as using Su Zi Li Hou Tang or Huang Lian Qing Hou Yin.) Consider this akin to the "Dragon-Thunder Fire" (Long Lei Zhi Huo), whose flames arise from Yin. (Dragon-Thunder Fire refers to Deficient Fire (Xu Huo). The nature of Dragon-Thunder requires clouds to gather before it can rise; ironically, rain makes it more intense. If the sky is clear and the sun bright, it remains hidden. Similarly, the Ministerial Fire (Xiang Huo) in the Kidney (Shen) behaves thus: failure to regulate desires leads to a gradual accumulation of excessive Fire. In contrast, "Prairie Fire" (Liao Huo) refers to Ordinary Fire (Fan Huo), i.e., Excess Fire (Shi Huo). Accumulating among firewood and dry grass, it starts with a single spark, seemingly insignificant. However, from sparks to flames, and from flames to roaring fires, it becomes unstoppable and unapproachable. In the human body, this may result from external pathogens injuring the exterior or internal deficiency causing exhaustion of Jin-Ye (Body Fluids), leading to blazing pathogenic Heat. This is not a sudden occurrence but develops over time, as seen in conditions like Throat Abscess (Hou Yong) or Tonsillar Swelling (Hou E).) Sudden onset does not indicate Fire (Excess), while slow onset does not indicate Cold (Deficiency). (This cites the principles of *Ling Shu* and the *Nei Jing* and *Nan Jing* to demonstrate the differentiation of Deficiency and Excess. Dragon-Thunder Fire (Deficient Fire) lies latent within Yin; when inactive, it is unrecognized as Fire, but once activated, it is violent and uncontrollable, hence the sudden onset of disease. Conversely, the有形 (tangible) Yang Fire (Excess Fire) of the Five Elements grows gradually from sparks to a prairie fire, hence the slow progression of disease. Here, "Fire" refers to Yang Fire (Excess Fire), and "Cold" refers to Deficient Fire. There is a vast difference between sudden and slow onset. Treating disease is not difficult; recognizing it is. Only by clearly distinguishing between Deficiency/Excess and Cold/Heat can one ensure immediate efficacy in medication.) This requires discernment by wise individuals. Knowing how to differentiate ensures accurate prescription. (If a Yin-Cold syndrome is mistakenly treated with Yang-Fire warming drugs, it causes stubborn Phlegm to block the mouth and nose, producing a sawing sound during respiration, leading to death by respiratory arrest. If a Yang-Fire syndrome is mistakenly treated with Yin-Cold cooling drugs, it causes severe swelling, obstruction, and ulceration of the throat, with the tongue turning purple like an eggplant, leading to death by inability to eat or drink. Alas! A slight error leads to a thousand-mile deviation; life and death hang in the balance. How can medicine be regarded as a trivial pursuit? Only those who can differentiate according to symptoms and prescribe accurately—achieving near-perfect success—are truly wise.)