伏邪在少阴，其由经气而外出者，则达于三阳；其化热而内壅者，则结于胃腑∶此温热病之常也。少阴之
系，上连于肺。邪热由肾系而上逆于肺，则见肺病。况温邪化热，火必克金，则肺脏本为温邪所当犯之也。其
或热壅于胃，上熏于鬲，则热邪由胃而炎及于肺，更为病势所应有。近时烟草盛行，肺中津液，熏灼成痰，阻
窒肺隧，平日每多痰咳，更值温热上蒸，痰得
热而痰更胶粘，热附痰而热愈留恋，其为咳为喘，意中事也。肺络不通，则胸胁刺痛；热郁日甚，则痰秽如脓
，或咳红带血，无非热灼金伤所致。此时苟伏邪已一律外透，则治之者，只须清泄肺胃。夫病在肺，而何以治
者必兼及胃？盖肺中之热，悉由胃腑上熏。清肺而不先清胃，则热之来路不清，非釜底抽薪之道也。古方如麻
杏甘石、越婢、青龙，清燥救肺等方，均用石膏，诚见及于此也。轻则苇茎汤，鲜斛、鲜沙参之类，必不可少
。胁刺者兼和络气，咳红者兼清血络。滋腻之药，恐其助痰；温燥之品，恐其助热；均为此症所忌。又此症在
初起时，医者粗心不察，视为寻常外感，恣用发散；或见其痰多，妄用二陈∶或见其喘逆，作外感治而用麻、
桂，作内伤治而用生脉、熟地；均属背谬。而耗液助热生痰，诸弊毕集矣。迨见病势日增，始细心体认，改投
清泄。而肺金脏阴已伤，不能遽复。即使邪热得清，而内热干咳，绵延不愈，遂成上损，终致不救者，往往有
之，谁之咎哉。
伏邪潜伏在少阴经，如果它通过经气向外发散，就会到达三阳经；如果它化热并向内壅滞，就会结聚在胃腑：这是温热病的常规情况。少阴经的脉络，向上连接于肺。邪热从肾系向上逆犯于肺，就会出现肺部的病症。况且温邪化热后，火性必然克制金性（肺属金），所以肺脏本来就是温邪应当侵犯的目标。或者热邪壅滞在胃，向上熏蒸至膈膜，那么热邪由胃蔓延波及到肺，更是病情发展所必然有的现象。近来烟草盛行，肺中的津液被熏灼而成痰，阻塞了肺的通道，平时往往多有痰咳，再加上温热之气上蒸，痰得到热邪而变得更加胶粘，热邪依附于痰而更加留恋不去，出现咳嗽和喘息，是意料之中的事情。肺络不通畅，就会出现胸胁刺痛；热郁积日益严重，则痰液秽浊如脓，或者咳嗽带血，无非是热邪灼伤肺金所致。此时如果伏邪已经全部向外透发，那么治疗者，只需要清泄肺胃的热邪。病位在肺，为什么治疗必须兼及胃？因为肺中的热邪，完全由胃腑向上熏蒸而来。清肺而不先清胃，那么热邪的来源就没有清除，这不是釜底抽薪的方法。古方如麻杏甘石汤、越婢汤、青龙汤、清燥救肺汤等，都使用石膏，确实是看到了这一点。轻症用苇茎汤，鲜石斛、鲜沙参之类，必不可少。有胁肋刺痛症状的兼以调和络脉气机，有咳血症状的兼以清清热血络。滋腻的药物，恐怕会助长痰湿；温燥的药物，恐怕会助长热邪；都是此症所禁忌的。另外，此症在初起时，医生粗心不仔细考察，把它视为寻常的外感病，肆意使用发散药物；或者见到痰多，胡乱使用二陈汤；或者见到喘息逆气，当作外感治疗而用麻黄、桂枝，当作内伤治疗而用人参、麦冬、熟地黄；都属于违背医理的错误。从而耗伤津液、助长热邪、滋生痰湿，各种弊端全都集中出现了。等到看到病情日益加重，才开始细心体察认识，改用清泄之法。而肺金的脏阴已经受伤，不能迅速恢复。即使邪热得以清除，但内热干咳，绵延不愈，最终成为上损（虚劳重症），导致无法救治的情况，往往存在，这又是谁的过错呢。
When latent pathogens reside in the Shaoyin (Lesser Yin) channel, those that emerge outward via the channel qi reach the Three Yang channels; those that transform into heat and obstruct inwardly knot in the Stomach fu-organ: this is the normal pattern of warm-heat diseases. The Shaoyin system connects upward to the Lung. When pathogenic heat reverses upward from the Kidney system to the Lung, Lung disorders manifest. Moreover, as warm pathogens transform into heat, Fire inevitably overacts on Metal (the Lung belongs to Metal); thus, the Lung organ is inherently a target for warm pathogens. Alternatively, if heat obstructs in the Stomach and steams upward to the Diaphragm, pathogenic heat spreads from the Stomach to involve the Lung, which is also a natural progression of the disease. In recent times, with the prevalence of tobacco smoking, the fluids in the Lung are scorched into phlegm, obstructing the Lung passages. Patients often suffer from chronic phlegm and cough. When further subjected to steaming warm-heat, the phlegm becomes more sticky due to heat, and heat lingers longer by adhering to phlegm; consequently, cough and wheezing are inevitable. If the Lung collaterals are blocked, stabbing pain in the chest and hypochondrium occurs; as heat stagnation intensifies daily, sputum becomes foul and purulent, or hemoptysis (coughing up blood) appears, all caused by heat scorching and injuring Metal. At this stage, if the latent pathogen has fully exteriorized, treatment requires only clearing and draining heat from the Lung and Stomach. Why must treatment targeting the Lung also address the Stomach? Because the heat in the Lung entirely stems from steaming upward from the Stomach fu-organ. Clearing the Lung without first clearing the Stomach fails to cut off the source of heat, which is not the method of "drawing firewood from under the cauldron" (removing the root cause). Ancient formulas such as Mahuang Xingren Gancao Shigao Decoction (Ephedra, Apricot Seed, Licorice, and Gypsum Decoction), Yuespi Decoction, Qinglong Decoction, and Qingzao Jiufei Decoction (Dryness-Rescuing Lung-Decoction) all utilize Shigao (Gypsum Fibrosum), demonstrating insight into this principle. For mild cases, Weijing Decoction (Asparagus Twig Decoction), along with fresh Dihu (Dendrobii Caulis) and fresh Shashen (Glehniae Radix), are indispensable. For cases with stabbing pain in the hypochondrium, harmonizing collateral qi is added; for cases with hemoptysis, clearing the blood collaterals is added. Greasy/nourishing drugs are contraindicated as they may promote phlegm; warm/drying herbs are contraindicated as they may exacerbate heat. Furthermore, at the onset of this condition, physicians who are careless and fail to examine properly may mistake it for ordinary external contraction, recklessly using diaphoretic (sweating-inducing) methods. Or, seeing abundant phlegm, they might wrongly use Erchen Decoction (Two-Aged Decoction). Or, observing wheezing and reverse qi flow, they might treat it as an external contraction using Mahuang (Ephedrae Herba) and Guizhi (Cinnamomi Ramulus), or treat it as internal injury using Shengmai San (Generate the Pulse Powder) and Shudi Huang (Rehmanniae Radix Preparata). All these approaches are erroneous. They consume body fluids, assist heat, and generate phlegm, resulting in various complications. Only when the disease worsens day by day do they carefully reassess and switch to clearing and draining methods. However, the Yin of the Lung metal is already damaged and cannot recover quickly. Even if pathogenic heat is cleared, persistent dry cough due to internal heat may linger unresolved, eventually developing into Shang Sun (Upper Consumption/Deficiency Syndrome), leading to incurable outcomes. Such cases are common; whose fault is this?