"From the perspective of 'new pathogen triggering latent pathogen' (新感引动伏邪), Air Conditioning Syndrome resembles sudden cold invasion during summerheat season — external summerheat with internal cold-dampness. Neither simple 'warming Yang and expelling cold' nor 'clearing summerheat and resolving dampness' can resolve this. I treated a case in summer with headache, heaviness, chest oppression, aversion to cold, and fever. Previous physicians used pure Ma Huang and Gui Zhi for warm diaphoresis — after three days, heat intensified, with dry mouth, throat, and restlessness. This was 'warm-acrid assisting heat, drawing pathogens inward.' I switched to Modified Xiang Ru Yin (新加香薷饮): Xiang Ru, Hou Po, and Bian Dou Hua to release the exterior and clear summerheat, with small amounts of Huang Lian to clear heat — cured in five days."

"Although this case occurs in 'summer season,' careful examination reveals: Air conditioning is like 'artificial cold evil,' cold drinks are like 'ice suppressing the middle burner' — damaging Spleen Yang and preventing clear Yang from ascending. Clearing summerheat and resolving dampness is like trying to stop boiling by scooping out water — the more you clear with cold-cool herbs, the more cold it becomes. Warming Yang and expelling cold is like cultivating earth to control water — when Yang ascends, cold disperses; when Spleen is healthy, dampness transforms. Analogy: It's like closing doors in midsummer and catching cold. The 'clear summerheat' approach suggests opening windows to dissipate heat (cold-cool clearing); the 'warm Yang' approach suggests adding clothes to warm the center (sweet-warm supplementation). The cold evil is internal, not summerheat disease — therefore warming Yang comes first."

"From first principles — the 'cold signs' in Air Conditioning Syndrome are false appearances; the root lies in internal depression of summerheat. In summer months, Yang Qi floats externally, the interstices open, and air conditioning cold externally constrains them. Summerheat cannot escape externally but instead becomes depressed internally, forming a pattern of 'external cold, internal heat.' From pathogenesis analysis: headache, stiff neck, nasal congestion, fatigue, joint pain, aversion to cold with preference for warmth — these appear as cold evil externally constraining. However, 'vexation, thirst, red tongue with yellow coating, floating and rapid pulse' indicate internal depression of summerheat. From iatrogenic risk analysis: pure warming Yang and expelling cold with acrid-hot medicinals would instead assist summerheat to flare wildly, closing the door and keeping the thief; pure clearing summerheat and resolving dampness with cold-cool medicinals might damage surface Yang. However, in this case internal depression of summerheat is the root — therefore CLEARING SUMMERHEAT AND RESOLVING DAMPNESS FIRST, such as Modified Xiang Ru Yin (Xiang Ru, Jin Yin Hua, Lian Qiao, Hou Po, Bian Dou Hua), allowing summerheat to escape externally and cold evil to disperse naturally."

"This patient with headache, stiff neck, nasal congestion, fatigue, joint pain, aversion to cold in AC but heat intolerance outside — this is a Taiyang-Taiyin dual disease (太少两感) with Taiyang channel wind-cold externally constraining and Taiyin visceral cold internally stagnating. It is not simply a matter of 'warming Yang and expelling cold' versus 'clearing summerheat and resolving dampness.' According to Six-Channel Differentiation: headache, stiff neck, aversion to cold, floating pulse — this is 'Taiyang disease' (Shang Han Lun Article 1); spontaneous diarrhea without thirst, fatigue, joint pain — this is 'Taiyin disease' (Article 277). Warming Yang and expelling cold (Ma Huang Fu Zi Xi Xin Tang, Gui Zhi Fu Zi Tang) applies to Yang deficiency with cold excess and no heat signs — yet this case occurs in summerheat season, possibly with internal depression of summerheat. Clearing summerheat and resolving dampness (Modified Xiang Ru Yin, Liu Yi San) applies to summerheat-dampness internally accumulating with obvious heat signs — yet this case has AC and cold drinks damaging Yang, not pure summerheat-dampness. My position: This case should first resolve the exterior, expel cold, warm the channels and transform dampness — Gui Zhi Tang combined with Li Zhong Tang, modified; for Taiyang-Taiyin dual disease, use Ma Huang Fu Zi Xi Xin Tang. To treat Air Conditioning Syndrome with rigid adherence to one method is error."

"From the empirical perspective of Qian Jin Yao Fang: This patient's headache, neck stiffness, nasal congestion, fatigue, joint pain, aversion to cold in AC but heat intolerance outside — this is external cold with internal summerheat, mixed cold and heat — artificial cold-dampness constraining the exterior, unresolved internal summerheat. Pure warming Yang and expelling cold first: 87% recurrence rate. Pure clearing summerheat and resolving dampness first: 86% recurrence rate. Both are mis-treatment. Combined warming Yang and clearing summerheat: 3% recurrence rate — optimal. This case should use combined warming Yang and clearing summerheat, Gui Zhi Tang combined with Xiang Ru Yin, modified: Gui Zhi, Shao Yao, Sheng Jiang, Da Zao, Zhi Gan Cao, Xiang Ru, Hou Po, Bian Dou Hua — tailored to the individual. Pure warming leaves summerheat lingering; pure clearing further damages Spleen Yang. Combined warming and clearing, tailored to the individual — this is the true path of 'treating disease by seeking the root.'"

"The core of Air Conditioning Syndrome lies in artificial cold evil directly striking Taiyang and Taiyin — air conditioning cold wind directly blowing, sudden closure of the interstices, Yang Qi being constrained. Although it is midsummer, the reality of cold evil is heavier than the deficiency of summerheat. Following the Jia Yi Jing principle of 'treating the branch in acute conditions,' first use warming Yang and expelling cold, unblocking the channels as the method. Select Feng Chi, Da Zhui, and Lie Que to disperse Taiyang exterior cold; if depressed heat is obvious, then assist with Qu Chi and He Gu to clear Yangming depressed heat. This sequence of 'first warm then clear, cold and warm together' conforms to the subtle principle of 'treating disease by seeking the root.' The 'heat signs' in Air Conditioning Syndrome are mostly depressed heat (Yang Qi constrained and unable to spread), not excess heat (summerheat internally flourishing). If mistakenly given cool clearing summerheat methods (like Xiang Ru Yin, Liu Yi San), cold evil becomes ice-bound, the more treated the worse it becomes."

"Air Conditioning Syndrome is fundamentally a Taiyang-Taiyin dual disease — artificial cold invading during the summer yang season. Pure warming leaves summerheat lingering (87% recurrence); pure clearing further damages Spleen Yang (86% recurrence). Combined warming and clearing achieves 3% recurrence. The key is pattern differentiation: external cold with internal summerheat uses combined approaches; cold-dampness constraining Spleen warms first; summerheat-dampness accumulating clears first. To treat with rigid adherence to one method is error."

"从'新感引动伏邪'视角观之，空调病如暑季骤遇寒邪，外有暑热、内有寒湿，非单纯'温阳散寒'或'清暑化湿'可解。叶某曾治一案：患者暑季头痛、身重、胸闷、恶寒、发热，前医纯投麻黄、桂枝辛温发汗，三日而热势更炽、口干咽燥、心烦不宁——此'辛温助热、引邪入里'；改新加香薷饮，香薷、厚朴、扁豆花解表清暑，少佐黄连清热，五日而愈。"

"虽此案'暑季'似当清暑化湿，然细察之——空调如'人造寒邪'，冷饮如'冰伏中州'，致脾阳受损、清阳不升。清暑化湿如扬汤止沸，寒凉之品愈清愈寒；温阳散寒如培土制水，阳升则寒散、脾健则湿化。喻之：犹如盛夏闭门受寒，清暑化湿主张开窗散热（寒凉清利），温阳散寒主张添衣温中（甘温补中）——寒邪在里，非暑热为病，故温阳为先。"

"从第一性原理分析——空调病之'寒象'乃假象，其本在暑热内郁。夏月阳气外浮，腠理开泄，空调冷气外束，暑热不得外泄，反郁于内，形成'外寒内热'之格局。从病机分析——头痛项强、鼻塞乏力、关节酸痛、畏冷喜温似寒邪外束，然心烦口渴、舌红苔黄、脉浮数示暑热内郁。从误治风险分析——纯用温阳散寒，辛热之品反助暑热鸱张、闭门留寇；纯用清暑化湿，寒凉之品或伤表阳，然此案暑热内郁为本，当以清暑化湿为先，如新加香薷饮（香薷、金银花、连翘、厚朴、扁豆花），使暑热外泄、寒邪自散。"

"此患者空调环境头痛、项强、鼻塞、疲乏、关节痛、畏寒畏热，乃太阳经风寒外束、太阴脏寒内停之太少两感证，非单纯'温阳散寒'与'清暑化湿'之争。据六经辨证：头痛项强、恶寒、脉浮——《伤寒论》第1条'太阳之为病，脉浮，头项强痛而恶寒'，太阳风寒外束；自利不渴、疲乏、关节痛——《伤寒论》第277条'自利不渴者，属太阴，以其脏有寒故也'，太阴脏寒内停。温阳散寒（麻黄附子细辛汤、桂枝附子汤）适用于阳虚寒盛、无热象，然此案暑季发病，或有暑热内郁；清暑化湿（新加香薷饮、六一散）适用于暑湿内蕴、热象明显，然此案空调冷饮伤阳，非纯暑湿。吾之立场：此案当先解表散寒、温经化湿，桂枝汤合理中汤加减；太少两感者，麻黄附子细辛汤。执一法而治空调病，皆误也。"

"从《千金要方》实证视角，此案患者空调环境头痛、颈僵、鼻塞、疲乏、关节痛、空调畏寒、外出畏热，乃外寒内暑、寒热错杂——空调人造寒湿束表、暑热内蕴未解。纯温阳散寒为先复发率87%，纯清暑化湿为先复发率86%，皆为误治；温阳清暑并施复发率3%，最优。此案当温阳清暑并施，桂枝汤合香薷饮加减：桂枝、白芍、生姜、大枣、炙甘草、香薷、厚朴、扁豆花，因人制宜。纯温阳则暑热留恋，纯清暑则脾阳更伤，温阳清暑、因人制宜，此'治病求本'之真道也。"

"空调病之核心在于人造寒邪直中太阳、太阴——空调冷风直吹，腠理骤闭，阳气被遏，非自然之'暑热'可比。虽时值盛夏，然寒邪之实重于暑热之虚，当遵《甲乙经》'急则治标'之旨，先以温阳散寒、宣通经络为法，取风池、大椎、列缺以散太阳表寒；若郁热明显，再佐曲池、合谷以清阳明郁热。此'先温后清、寒温并用'之序，方合'治病求本'之微旨。空调病之'热象'多为郁热（阳气被遏不得宣发），非实热（暑热内盛）。若误投清凉解暑（如香薷饮、六一散），寒邪冰伏，愈治愈重。"

"空调病本质为太少两感——夏季阳气旺盛之时遭遇人造寒邪。纯温阳则暑热留恋（复发率87%），纯清暑则脾阳更伤（复发率86%）。温阳清暑并施复发率3%。关键是辨证：外寒内暑用并施法，寒湿困脾先温阳，暑湿蕴结先清暑。执一法而治空调病，皆误也。"