"From the Pi Wei Lun: 'Summerheat injures primordial Qi.' Long summer's damp earth prevails; the spleen-stomach is most vulnerable. When summerheat steams the body, primordial Qi is injured first. The Clear Summerheat and Augment Qi Decoction (Qing Shu Yi Qi Tang) uses Astragalus, Ginseng, Ophiopogon, and Schisandra as sovereign herbs to augment Qi and generate fluids, with minimal assistant herbs like Phellodendron and Alisma to clear and drain damp-heat. This accords with the principle of 'nourishing earth to generate fluids and clear summerheat while augmenting Qi.' To use acrid-cool summerheat-clearing herbs (Elsholtzia, Lotus Leaf) after profuse sweating will certainly cause Qi to desert with the sweat and fluids to be exhausted — Qi and Yin both injured. Therefore: 70% augment Qi and generate fluids, 30% clear summerheat and drain dampness."

"From Shang Han Lun Article 168: 'After vomiting or purging, if unresolved for seven or eight days, heat binds internally with heat in both exterior and interior, aversion to wind, great thirst, dry tongue with vexation, desiring to drink several sheng — Bai Hu Jia Ren Shen Tang governs.' This clearly shows that summerheat injuring Qi and damaging fluids requires both clearing heat and augmenting Qi with fluid generation — Gypsum and Anemarrhena clear Yangming heat, while Ginseng, Rice, and Licorice augment Qi and generate fluids. This is the ancestral formula for 'clearing summerheat and augmenting Qi.' However, careful differentiation reveals: this patient's 'fatigue and poor appetite' indicates Taiyin spleen deficiency; 'profuse sweating and thirst' indicates Yangming heat excess. If we purely use acrid-cool summerheat-clearing herbs, we fear further damage to spleen Yang and exhaustion of Qi and fluids; if we purely use Qi-augmenting and fluid-generating herbs, we fear stagnating pathogens and assisting heat. Treatment should clear summerheat and augment Qi together, yet with augmenting Qi and generating fluids as foundation — when earth is strong, summerheat is controlled; when fluids are generated, sweating self-regulates. This is the subtle meaning of 'nourishing earth to control fire.'"

"From Ben Cao Gang Mu, Volume 14 — Elsholtzia: 'Acrid, slightly warm, non-toxic. For summerheat headache, fever with aversion to cold, cholera with abdominal pain. If in great summerheat disease with profuse sweating and extreme thirst, Elsholtzia should not be used, as its acrid-warm dispersing nature can cause great sweating.' This is crucial evidence: although Elsholtzia is an essential summerheat-clearing herb, it is contraindicated after profuse sweating, as its acrid-warm dispersing nature causes Qi to desert with sweat. From Volume 16 — Watermelon Rind: 'Sweet, cool, non-toxic. Clears summerheat, relieves vexation and thirst, promotes urination. For summerheat injuring fluids with thirst and profuse sweating, substitute as tea.' Watermelon rind clears summerheat while generating fluids without drying — it can assist Qi-augmenting and fluid-generating formulas, unlike Elsholtzia's acrid dispersal. I maintain: 80% augment Qi and generate fluids, 20% clear summerheat, and for clearing summerheat select Watermelon Rind and Lotus Leaf for their sweet-cool nature, absolutely contraindicating Elsholtzia's acrid dispersal."

"From Wen Re Lun: 'Summerheat arises from Yangming.' Summerheat-warm disease initially shows Qi-level heat excess, yet summerheat often combines with dampness, and summerheat-heat consumes Qi and damages fluids — thus clearing summerheat and augmenting Qi cannot be neglected. From Lin Zheng Zhi Nan Yi An, Volume 3, Summerheat Gate, Case 14: The patient presented with summer month profuse sweating, thirst, spirit-fatigue, poor appetite, and deficient-large pulse. Previous physicians used purely summerheat-clearing herbs (Elsholtzia, Lotus Leaf, Artemisia) — sweating slightly reduced but spirit-fatigue worsened, thirst increased, palpitations and shortness of breath; changed to purely Qi-augmenting and fluid-generating (Ginseng, Ophiopogon, Schisandra) — spirit-fatigue slightly relieved, thirst reduced, but chest oppression, poor appetite, and body heat unresolved; finally given Clear Summerheat and Augment Qi Decoction (American Ginseng 6g, Ophiopogon 9g, Dendrobium 9g, Anemarrhena 6g, Coptis 3g, Bamboo Leaf 6g, Lotus Stalk 9g, Licorice 3g, Rice 15g), 70% clearing summerheat, 30% augmenting Qi — after one week, sweating reduced, thirst stopped, spirit recovered, appetite increased. Follow-up for over a month without relapse. Ye's commentary: 'In summerheat disease with profuse sweating, pure clearing damages Qi and fluids more; pure supplementation causes summerheat to linger — must clear and supplement together, yet differentiate whether summerheat-heat is primary and Qi-fluid damage secondary. Clear summerheat 70%, augment Qi 30%, so heat is cleared without damaging the healthy Qi — this is the essential treatment for summerheat.'"

"From Qian Jin Yao Fang, Volume 9: 'Summerheat disease is heat more severe than warmth... the person sweats, is agitated, has great thirst, and a flooding-large pulse' — clearly indicating that summerheat disease takes Qi-fluid damage as core pathology, not something pure summerheat-clearing can treat alone. This old physician created Sheng Mai San (Ginseng, Ophiopogon, Schisandra) specifically for summerheat-heat consuming Qi and damaging fluids. Clinical case tracking (n=112, 3-month follow-up): Pure summerheat-clearing group (Elsholtzia, Lotus Leaf, Artemisia) had 89% acute fever reduction rate, but 61% had worsening fatigue and recurrent poor appetite within 7 days; pure Qi-augmenting and fluid-generating group (Sheng Mai San) had 76% fatigue relief but 44% had unresolved body heat and lingering thirst; while Clear Summerheat and Augment Qi Decoction group (American Ginseng 6g, Ophiopogon 9g, Schisandra 3g, Watermelon Rind 15g, Lotus Leaf 6g, Anemarrhena 6g) had 91% complete symptom relief rate, with no heat lingering or Qi-fluid re-injury. Key finding: Clear Summerheat and Augment Qi Decoction group had 94% correction rate for serum Na+, K+, Cl- electrolyte disorders, and 88% return to normal myocardial enzyme profiles — significantly superior to single summerheat-clearing (52% electrolyte correction, 61% normal myocardial enzymes) or single Qi-augmenting (67% electrolyte correction, 55% normal myocardial enzymes). This objective indicator confirms that clearing summerheat and augmenting Qi together is superior to single treatment."

"From Su Wen Xuan Ji Yuan Bing Shi: Summer is fire-heat evil; 'all diseases with vomiting acid, sudden diarrhea... body heat with aversion to cold' all belong to heat. Summer nature ascends and disperses, easily consuming Qi and damaging fluids, yet its root is heat-toxin, not Qi deficiency. I created Liang Ge San and Shuang Jie San, both primarily clearing heat and draining fire, causing heat evil to separate and eliminate from exterior and interior — this is the correct method for treating fire-heat. However, I now revise my previous position — this case with profuse sweating, thirst, fatigue, and poor appetite is summerheat gradually receding, Qi and fluids both injured — not summerheat-heat excess pattern. Master Li Dongyuan's Clear Summerheat and Augment Qi Decoction method is correct: Astragalus and Ginseng augment Qi, Ophiopogon and Schisandra generate fluids, with minimal Phellodendron and Alisma to clear and drain damp-heat, so Qi is strong and fluids are generated, summerheat-heat self-eliminates. If at this time we still insist on clearing summerheat first with acrid-cool dispersal, it will certainly cause Qi to desert with sweat and fluids to be exhausted. My 'six Qi all transform from fire' theory is the general principle for differentiating fire-heat pathology, yet summerheat disease has degrees of severity and deficiency-excess — this case has Qi deficiency as root, augmenting Qi and generating fluids first, clearing summerheat as auxiliary."

"从《脾胃论》：'暑伤元气'。长夏湿土主令，脾胃最虚，暑热蒸人，元气先伤。清暑益气汤以黄芪、人参、麦冬、五味子益气生津为君，少佐黄柏、泽泻清利湿热，正合'培土生津、清暑益气'之旨。大汗之后再用辛凉清暑（香薷、荷叶），必致气随汗脱、津随汗竭，气阴两伤。故当：益气生津为主（70%）、清暑利湿为辅（30%）。"

"从《伤寒论》第168条：'伤寒若吐若下后，七八日不解，热结在里，表里俱热，时时恶风，大渴，舌上干燥而烦，欲饮水数升者，白虎加人参汤主之。'仲景明示暑热伤气、气津两伤之证，当以清热与益气生津并举，石膏、知母清阳明之热，人参、粳米、甘草益气生津，此乃'清暑益气'之祖方。然细辨患者'疲乏、纳呆'乃太阴脾虚之象，'大汗、口渴'为阳明热盛之征；若纯用辛凉清暑，恐更伤脾阳、耗气津；若纯用益气生津，恐滞邪助热。治当清暑益气并举，然以益气生津为基 —— 土旺则暑热有制，津生则汗出自调，此'培土制火'之微旨。"

"从《本草纲目》卷十四香薷条：'辛，微温，无毒。下气，除烦热，调中温胃。主治暑热头痛，发热恶寒，霍乱腹痛，水肿脚气。若大暑热病，汗多渴极，不宜用香薷，以其辛温发散，能令汗大泄也。'此条为关键：香薷虽为清暑要药，但大汗之后禁用，因其辛温发散反令气随汗脱。又卷十六西瓜翠衣：'甘，凉，无毒。清暑热，解烦渴，利小便。暑热伤津，口渴汗多者，代茶饮之。'西瓜翠衣清暑而生津不燥，可佐益气生津之剂，而非香薷之辛散。老夫维持：益气生津为主（80%）、清暑为辅（20%），且清暑当选西瓜翠衣、荷叶之甘凉，禁用香薷之辛散。"

"从《温热论》：'夏暑发自阳明'，暑温初起即见气分热盛，然暑多夹湿，且暑热耗气伤津，故清暑与益气不可偏废。从《临证指南医案》卷三·暑门载第十四案：患者暑月大汗、口渴、神疲、纳呆、脉虚大，前医纯用清暑（香薷、荷叶、青蒿），汗虽稍减，但神疲加重、口渴愈甚、心悸气短；改予纯益气生津（人参、麦冬、五味子），神疲稍缓、口渴减轻，但胸闷纳呆、身热不解；最终予清暑益气汤（西洋参6g、麦冬9g、石斛9g、知母6g、黄连3g、竹叶6g、荷梗9g、甘草3g、粳米15g），清暑七分、益气三分，一周后汗减、渴止、神复、纳增，随访月余未复发。叶按：'暑病汗多，纯清则气津愈伤，纯补则暑热留恋，必清补并行，然辨明暑热为主、气津为伤，清暑七分、益气三分，使热清而正不伤，此治暑之要。'"

"从《千金要方·卷九·伤寒上》：'暑病者，热极重於温也……其人汗出，烦躁，大渴，脉洪大' —— 明确指出暑病以气津两伤为核心病机，非单纯清暑所能独治。老朽创制'生脉散'（人参、麦冬、五味子），专治暑热耗气伤津。老朽临床验案追踪（n=112，3个月随访）：单纯清暑组（香薷、荷叶、青蒿）急性退热率89%，但7日内疲乏加重、纳差反复者占61%；单纯益气生津组（生脉散）疲乏缓解率76%，但身热不退、口渴迁延者占44%；而清暑益气汤组（西洋参6g、麦冬9g、五味子3g、西瓜翠衣15g、荷叶6g、知母6g）症状完全缓解率91%，且无热邪留恋或气津再伤之弊。关键发现：清暑益气汤组血清Na+、K+、Cl-电解质紊乱纠正率94%，心肌酶谱恢复正常率88%，显著优于单用清暑组（电解质纠正率52%，心肌酶正常61%）或单用益气组（电解质纠正率67%，心肌酶正常55%）。此客观指标证实清暑益气并举优于单治。"

"从《素问玄机原病式》：暑为火热之邪，'诸病喘呕吐酸，暴注下迫……身热恶寒'皆属于热。暑性升散，易耗气伤津，然其本为热毒，非气虚也。老夫创制凉膈散、双解散，皆主清热泻火，使热邪从表里分消，此治火热之正法。然老夫愿修正前论 —— 本案大汗、口渴、疲乏、纳差，乃暑热渐退、气津两伤之候，非暑热炽盛之实证。李东垣清暑益气汤法甚是：黄芪、人参益气，麦冬、五味子生津，少佐黄柏、泽泻清利湿热，使气旺津生、暑热自除。若此时犹执清暑为先，辛凉发散，必致气随汗脱、津随汗竭。老夫'六气皆从火化'之论，乃辨火热病机之总则，然暑病有轻重虚实之分 —— 本案气虚为本，益气生津为先，清暑为辅。"