吞酸之症皆肝木之凌土也何以有阴阳之殊哉不知肝经虽属阴然肝中有火以克脾克胃而阴
阳遂
分之矣大约脾受肝火之侵多属于阴胃受肝火之犯多属于阳耳犯于阳者心中嘈杂如火之焚烧饮
之水而辄吐吐水必黄绿之色如醋之酸而不可闻者是也方用解酸汤治之此方之妙皆舒肝之圣药
而又解其火郁之气自然手到功成也侵于阴者虽胸中作酸而不甚今日食之必至明日吞酸而不
可咽
口虽作渴饮之水而酸更加吐出必纯是清水可用热物而不可用凉物者是也方用八味地黄丸实与
症相宜然而丸方终不及煎方之速吾今定一方治阴症之吞酸有奇功也方名补阴化酸汤一剂少轻
二剂即愈此方之妙妙在健脾多于补肾盖脾健则水湿自去邪水既去而真水自生肾水行于脾之中
脾气即通于胃之上又何至胃口之寒出于吞酸而作吐乎倘不知补脾于肾中而惟图止酸于胃上势
必变为反胃而不可止也
解酸汤
柴胡（二钱） 白芍（五钱） 苍术（五钱） 炒栀子（三钱） 茯苓（五钱） 陈皮（一钱） 浓朴（一
钱） 神曲（一钱） 砂仁（三粒） 枳壳（五分） 香附（二钱）水煎服
补阴化酸汤
肉桂（五分） 熟地（五钱） 山药（一两） 山茱萸（三钱） 芡实（五钱） 陈皮（五分） 薏仁（五
钱） 车前子（三钱） 附子（一钱） 人参（五钱） 白术（五钱） 白芥子（三钱）水煎服
吞酸这一病症，都是由于肝木（肝脏功能亢进或气机郁滞）克制脾土（脾胃功能）所致。为什么会有阴证和阳证的区分呢？不知道虽然肝经在五行中属阴，但肝中蕴藏着相火，这股火气会克制脾脏和胃腑，从而使得病情分为阴阳两类。
大抵来说，脾脏受到肝火的侵犯，多属于阴证；胃腑受到肝火的侵犯，多属于阳证。
侵犯于阳证的情况是：心中感到嘈杂不适，如同火焰焚烧一般，喝下水后随即呕吐出来，吐出的水必定呈现黄绿色，气味像醋一样酸臭且令人难以忍受。这种情况使用解酸汤治疗。这个方子的妙处在于使用了舒肝的圣药，同时解除了肝中郁结的火气，自然能够手到病除。
侵犯于阴证的情况是：虽然胸中感到酸楚，但程度不重，今天吃了东西，必然导致第二天出现吞酸且无法咽下的症状。口中虽然觉得口渴，喝水后酸味反而加重并呕吐出来，吐出的必定全是清水。这种情况可以使用热性药物，而不可使用凉性药物。这种情况使用八味地黄丸治疗，确实与病症相符。然而，丸药的疗效终究不如煎剂迅速。我现在制定一方，专门治疗阴证引起的吞酸，有奇效。方名叫做补阴化酸汤，服用一剂症状稍减，服用两剂即可痊愈。这个方子的妙处在于健脾的作用多于补肾。因为脾脏健运，则水湿自然去除；邪水既去，真水（肾阴/津液）自然生成。肾水运行于脾之中，脾气就能通达于胃之上，又怎么会因为胃口寒凉而导致吞酸呕吐呢？如果不懂得在补肾的同时补脾，而只图在胃上部止酸，势必会导致病情演变为反胃（食物入胃后未消化即吐出），且难以制止。
解酸汤
柴胡（二钱） 白芍（五钱） 苍术（五钱） 炒栀子（三钱） 茯苓（五钱） 陈皮（一钱） 厚朴（一钱） 神曲（一钱） 砂仁（三粒） 枳壳（五分） 香附（二钱） 水煎服
补阴化酸汤
肉桂（五分） 熟地黄（五钱） 山药（一两） 山茱萸（三钱） 芡实（五钱） 陈皮（五分） 薏苡仁（五钱） 车前子（三钱） 附子（一钱） 人参（五钱） 白术（五钱） 白芥子（三钱） 水煎服
The syndrome of acid regurgitation is caused by the encroachment of Liver Wood (Liver dysfunction or Qi stagnation) upon Spleen Earth (Spleen and Stomach function). Why is there a distinction between Yin and Yang? It is unknown that although the Liver Meridian belongs to Yin in Five Elements theory, the Liver contains Ministerial Fire. This fire attacks the Spleen and Stomach, thereby dividing the condition into Yin and Yang categories.
Generally speaking, when the Spleen is invaded by Liver Fire, it mostly belongs to the Yin syndrome; when the Stomach is invaded by Liver Fire, it mostly belongs to the Yang syndrome.
In cases attacking the Yang aspect: The patient experiences epigastric discomfort (Za Cha), feeling as if burning with fire. After drinking water, vomiting occurs immediately. The vomitus must be yellowish-green in color, smelling sour like vinegar and unbearable. For this, Jie Suan Tang (Acid-Resolving Decoction) is prescribed. The efficacy of this formula lies in its use of superior herbs for soothing the Liver, which simultaneously resolves the stagnant Fire Qi, leading to immediate recovery.
In cases attacking the Yin aspect: Although there is a sensation of sourness in the chest, it is not severe. Food eaten today will inevitably lead to acid regurgitation and inability to swallow the next day. Although the mouth feels thirsty, drinking water exacerbates the sourness and causes vomiting, resulting in the expulsion of clear water only. In such cases, warm-natured substances can be used, but cold-natured ones should be avoided. Ba Wei Di Huang Wan (Eight-Ingredient Pill from the Kidney Treasury) is prescribed, which indeed suits the syndrome. However, the efficacy of pills is ultimately slower than that of decoctions. I have now formulated a prescription specifically for treating acid regurgitation of the Yin type, which yields miraculous results. Named Bu Yin Hua Suan Tang (Yin-Nourishing Acid-Resolving Decoction), symptoms lessen after one dose and resolve completely after two doses. The brilliance of this formula lies in its emphasis on strengthening the Spleen over nourishing the Kidney. When the Spleen is strong, Dampness naturally dissipates; once pathogenic water is removed, True Water (Kidney Yin/Body Fluids) is generated. As Kidney Water circulates within the Spleen, Spleen Qi connects to the upper part of the Stomach. How could Cold at the stomach opening then cause acid regurgitation and vomiting? If one does not understand how to tonify the Spleen within the context of the Kidney, but only seeks to stop acid at the upper Stomach, the condition will inevitably evolve into Fan Wei (Reverse Regurgitation/Pyrosis), which becomes difficult to arrest.
Jie Suan Tang (Acid-Resolving Decoction)
Chai Hu (Bupleuri Radix, 2 qian) Bai Shao (Paeoniae Radix Alba, 5 qian) Cang Zhu (Atractylodis Rhizoma, 5 qian) Chao Zhi Zi (Gardeniae Fructus, Stir-fried, 3 qian) Fu Ling (Poria, 5 qian) Chen Pi (Citri Reticulatae Pericarpium, 1 qian) Hou Po (Magnoliae Officinalis Cortex, 1 qian) Shen Qu (Massa Medicata Fermentata, 1 qian) Sha Ren (Amomi Fructus Rotundus, 3 grains) Zhi Ke (Aurantii Fructus Immaturus, 0.5 fen) Xiang Fu (Cyperi Rhizoma, 2 qian) Decoct with water and take orally.
Bu Yin Hua Suan Tang (Yin-Nourishing Acid-Resolving Decoction)
Rou Gui (Cinnamomi Cortex, 0.5 fen) Shu Di Huang (Rehmanniae Radix Praeparata, 5 qian) Shan Yao (Dioscoreae Rhizoma, 1 liang) Shan Zhu Yu (Corni Fructus, 3 qian) Qian Shi (Euryales Semen, 5 qian) Chen Pi (Citri Reticulatae Pericarpium, 0.5 fen) Yi Yi Ren (Coicis Semen, 5 qian) Che Qian Zi (Plantaginis Semen, 3 qian) Fu Zi (Aconiti Lateralis Radix Praeparata, 1 qian) Ren Shen (Ginseng Radix, 5 qian) Bai Zhu (Atractylodis Macrocephalae Rhizoma, 5 qian) Bai Jie Zi (Sinapis Semen, 3 qian) Decoct with water and take orally.