Autumn Lung Dryness Debate: For dry cough, itchy throat, dry mouth at night, insomnia, afternoon fever in October — treat by (A) moistening dryness nourishing Yin, or (B) strengthening Spleen to generate Metal?

From the Six-Channel perspective, this case is NOT a simple A-vs-B choice but a Taiyang-Yangming-Taiyin triple-level complexity where "Spleen Qi weakness" is actually "Spleen constraint" (其脾为约, Article 247) — the Spleen is bound by Yangming dryness-heat and cannot distribute fluids upward to the Lung. The "red cracked tongue, thin rapid pulse, afternoon fever, dry mouth at night" establish Yangming fluid injury (Article 182) as the PRIMARY pathology; the "possible underlying Spleen Qi weakness" is SECONDARY constraint, not simple deficiency. Therefore, treatment must prioritize (A) moistening dryness nourishing Yin as PRIMARY — using Sha Shen Mai Dong Tang (Glehnia and Ophiopogonis Decoction) or Zhu Ye Shi Gao Tang (Bamboo Leaf and Gypsum Decoction) to clear Yangming heat and generate fluids; with (B) strengthening Spleen modified to "unbinding Spleen constraint" as SECONDARY — using Ma Zi Ren Wan's principle (hemp seed, apricot seed, peony to moisten; rhubarb, aurantium, magnolia to unbind) rather than Li Dongyuan's ascending formulas (Bu Zhong Yi Qi Tang) which would fan residual heat. This explains the clinical puzzle: pure Spleen-tonifying (Huang Qi, Sheng Ma, Chai Hu) fails because it tonifies without unbinding constraint; pure Yin-nourishing (Mai Men Dong, Bei Sha Shen) partially succeeds but does not restore Spleen distribution. **The integrated approach: moisten Yangming dryness, unbind Taiyin constraint, protect Spleen transformation — achieving "

"Spleen Qi weakness fails to generate Lung Metal; tonify Spleen to generate Metal." Result: throat irritation intensified, insomnia became severe, dry mouth worsened, afternoon fever rose, tongue cracks deepened, pulse turned wiry and rapid. I diagnosed: "This is not Spleen Qi weakness—this is Kidney Yin deficiency, ministerial fire disturbance, Lung losing moistening. Bu Zhong Yi Qi Tang's sweet-warm ascending nature stokes ministerial fire in Yin-deficient patients—like adding fuel to fire." Prescribed Bai He Gu Jin Tang combined with Da Bu Yin Wan. Recovery in six weeks. This case is the precise analog to the present debate. 3. My 1351 merchant's wife case — analogous to the "mixed pattern" concern: she presented with dry cough, red cracked tongue, thin rapid pulse, AND subtle pale undertone with slight teeth marks. Her physician prescribed sequential staging: first Bu Zhong Yi Qi Tang, then Bai He Gu Jin Tang. Result after Bu Zhong Yi Qi Tang: dry cough worsened, afternoon fever rose to 38.5°C, insomnia became severe, teeth marks disappeared as tongue turned fully red and peeled. I intervened with simultaneous approach: Bai He Gu Jin Tang with only Shan Yao 15g and Fu Ling 12g (gentle Spleen support without ascending herbs), omitting Huang Qi, Sheng Ma, Chai Hu entirely. Recovery in four weeks. This proves: **the "sequential Spleen-first" approach is dangerous in Yin-deficiency-dominant patterns; gentle simultaneous supp