病患服前药，胸膈不满闷者，此上焦有阳也，或药力太过，上焦有热，腹满虚鸣，时
时痛
。此是被阳药消逐，得上焦阴气并入下焦也。虽是下焦积寒冷，上焦阳盛，更难投温下焦药
也。当用灰包法∶炭灰或桑柴灰二三升许，入好醋拌和，干湿得所，铫内炒令灰热，以帛
包里，置脐下熨之，频换灰包令常热，以腹不满痛为度。或初熨时，病患不受者，勿听，但
令极熨之，不住灰包可也。如灰包熨后，得下利一两行，或小便二三升，或微似有汗，此是
阴气外出，或下泄也，勿疑之，病轻者乃得愈也。后出余气而解，举此为例。
病患三部脉沉，寸脉力小于关、尺，此为阴盛，当投温中药以消阴气。温中药者浓朴汤
，陈皮、人参、白术、藿香、当归、干姜、细辛之类是也。
海藏云∶霜露山岚雨湿雾露之气与饮冷，寸口脉小，同诊一法，神术汤后举。此韩氏三
部脉沉，寸口小于关、尺，为证一体。
病患若因服下药太过，两手脉沉细数，肢体逆冷，烦躁而渴者，此是阳气下陷入丹田，
阴气
厥逆满上二焦，故令人躁，此名下阴躁也。医者见病患烦躁，又不询其端由，亦不详其脉理，
便用凉药治之。凉药既下，病势愈甚，至于困极不救者多矣！
病患因下之太过，两手脉沉迟细而无力，或遍身及四肢逆冷，烦躁而渴，或引饮不休，
好泥
水中卧者，须用性热药治之。凡投性热药，皆须冷服，何故如是？今谓病患腹中阴气太盛，
若投汤济，即阴阳相系，药下即吐，须候汤剂极冷即投之。投之不吐者，盖腹中阴气与冷冻饮料
相逢，即同气相从尔，故药下不吐也。药虽冷，久则必热，所谓始同而终异也。故醇酒冷冻饮料
，久即发热。假令投仲景四逆汤之类，一根据前说。若病患不烦躁，即热药可温服之，下后躁
渴引饮不休，与伤冷只好饮冷同意。
上此一条，本是阳证下之成阴，非阳气上行而躁，乃阳气下陷而躁，即同伏阴脉也。叔
和云∶短脉阴中有伏阳。
海藏云∶热药冷服，内有伏阳则可，若脉已虚，按之全无力，或病患素无所养，只可温
服，不然阴气必不能酝酿回阳，利害非轻。
患者服用之前的药物后，如果胸膈部没有感到胀满闷痛，这说明上焦有阳气。或者是药力太过，导致上焦有热，出现腹部胀满、肠鸣虚响、时常疼痛的症状。这是因为被阳性的药物消解驱逐，使得上焦的阴气并入下焦所致。虽然此时下焦积聚寒冷，而上焦阳气旺盛，但更难直接投用温补下焦的药物。应当使用灰包熨法：取炭灰或桑柴灰约二三升，加入优质醋拌和，调节干湿程度适宜，在铫（一种金属锅）内炒至灰热，用布包裹，放置在脐下熨烫，频繁更换灰包以保持持续温热，以腹部不再胀满疼痛为度。如果在刚开始熨烫时，患者不能忍受，不要听从其停止的请求，只需极力熨烫，不停更换灰包即可。如果使用灰包熨后，患者排出少量大便一两行，或者小便排出二三升，或者微微似有汗出，这是阴气向外排出或向下泄出的表现，不要怀疑，病情较轻的患者才能痊愈。这是通过排出残余邪气而病愈的例子，以此为例说明。
患者三部脉象均沉，寸脉力量小于关脉和尺脉，这是阴气盛的表现，应当投用温中药物以消除阴气。温中药物包括厚朴汤，以及陈皮、人参、白术、藿香、当归、干姜、细辛之类的药材。
海藏（张元素）说：霜露、山岚、雨湿、雾露之气与饮用冷饮，导致寸口脉小，诊断方法相同，详见《神术汤》条目之后。这是韩氏关于三部脉沉，寸口脉小于关、尺脉，作为同一证候类型的论述。
如果患者因为服用泻下药太过，导致两手脉象沉细数，四肢逆冷，烦躁且口渴，这是阳气下陷进入丹田，阴气厥逆充满上二焦，所以使人躁动，这称为“下阴躁”。医生见到患者烦躁，又不询问病因缘由，也不详细诊察脉理，便使用凉性药物治疗。凉性药物服下后，病情反而更加严重，以至于困顿至极无法救治的情况很多！
患者因为泻下太过，导致两手脉象沉迟细而无力，或者全身及四肢逆冷，烦躁且口渴，或者引水饮不止，喜欢卧在泥水中，必须使用性质热的药物治疗。凡是投用性质热的药物，都必须冷服，为什么这样呢？现在认为患者腹中阴气太盛，如果投用热汤，就会阴阳相互格拒，药一下肚就会呕吐，必须等待汤剂极冷时再投用。投用后不呕吐的原因，是因为腹中的阴气与冷冻饮料相遇，即同气相从，所以药下不吐。药物虽然是冷的，但久留体内必然变热，这就是所谓“始同而终异”。例如醇酒与冷冻饮料混合，久置就会发热。假使投用仲景的四逆汤之类，一律按照前面的说法处理。如果患者不烦躁，那么热药可以温服；如果是泻下后躁渴引水饮不止，这与伤于冷邪只喜欢冷饮的道理相同。
上述这一条，原本是阳证误用泻下而成阴证，并非阳气上行导致的躁动，而是阳气下陷导致的躁动，这就如同伏阴脉一样。叔和（王叔和）说：短脉是阴中有伏阳。
海藏说：热药冷服，体内有伏阳时可以这样做；如果脉象已经虚弱，按之完全无力，或者患者平时缺乏调养，只能温服，否则阴气一定不能酝酿回阳，利害关系非轻。
The patient, after taking the previous medication, experiences no distension or oppression in the chest and diaphragm; this indicates that there is Yang Qi (Yang Energy) in the Upper Jiao (Upper Burner). Alternatively, the medicinal force may have been too strong, causing Heat in the Upper Jiao, resulting in abdominal fullness, empty borborygmi (intestinal rumbling), and occasional pain. This occurs because the Yang-type medication has dissipated and expelled the pathogen, causing Yin Qi from the Upper Jiao to merge into the Lower Jiao. Although there is accumulated Cold in the Lower Jiao and excess Yang in the Upper Jiao, it is difficult to directly administer medications that warm the Lower Jiao. One should use the Ash Bag Moxibustion Method: take approximately two to three sheng of charcoal ash or mulberry firewood ash, mix it with good vinegar, adjust the moisture content appropriately, stir-fry in a yin (metal pot) until the ash is hot, wrap it in cloth, place it below the navel for moxibustion, frequently replace the ash bag to maintain constant heat, and continue until the abdominal distension and pain cease. If the patient cannot tolerate the initial application, do not heed their request to stop; instead, apply intense moxibustion without stopping the replacement of ash bags. After the ash bag moxibustion, if the patient passes one or two stools, urinates two or three sheng, or sweats slightly, this indicates the outward discharge or downward evacuation of Yin Qi. Do not doubt this; only patients with mild conditions will recover. This resolves by expelling residual pathogenic factors, serving as an example.
If the pulse at the three positions (Cun, Guan, Chi) is deep, and the Cun pulse is weaker than the Guan and Chi pulses, this indicates excess Yin. One should administer Spleen-Stomach Warming Medications to dissipate the Yin Qi. These include Houpo Tang (Magnolia Bark Decoction), as well as herbs such as Chenpi (Aged Tangerine Peel), Renshen (Ginseng Root), Baizhu (Atractylodes Rhizome), Huoxiang (Patchouli Herb), Danggui (Angelica Sinensis Root), Ganjiang (Dried Ginger Rhizome), and Xixin (Asarum Root).
Haicang (Zhang Yuansu) stated: The pathogens of frost, dew, mountain mist, rain dampness, and fog, combined with drinking cold liquids, which result in a small Cun Kou (Radial Pulse at the Cun position), share the same diagnostic method, as detailed after the entry for Shenzhu Tang (Divine Efficacy Powder). This refers to Han Shi’s classification where deep pulses in all three positions, with the Cun Kou being smaller than the Guan and Chi, constitute a single syndrome pattern.
If a patient, due to excessive administration of purgative drugs, presents with deep, fine, and rapid pulses in both hands, cold extremities, irritability, and thirst, this indicates that Yang Qi has sunk into the Dantian (Lower Abdomen), and Yin Qi has reversed and filled the Upper and Middle Jiao, causing agitation. This is termed "Lower Yin Irritability." Physicians who see irritability in patients without inquiring into the cause or carefully examining the pulse logic often mistakenly administer Cooling Medications. Once these cooling drugs are taken, the disease condition worsens, leading to many cases of extreme debility and untreatable collapse!
If a patient, due to excessive purgation, presents with deep, slow, fine, and weak pulses in both hands, or generalized cold extremities including the limbs, irritability, thirst, incessant desire to drink, or a preference for lying in mud or water, one must treat with Hot-Natured Medications. Whenever administering Hot-Natured Medications, they must be taken cold. Why? It is believed that the patient's abdomen contains excessive Yin Qi. If hot decoctions are administered, Yin and Yang will repel each other, causing immediate vomiting upon ingestion. Therefore, the decoction must be allowed to become extremely cold before administration. The reason it does not cause vomiting is that the Yin Qi in the abdomen meets the frozen liquid, and like energies attract each other, so the medicine is retained. Although the medicine is cold initially, it will eventually become hot within the body; this is what is meant by "starting the same but ending differently." For instance, wine mixed with frozen drinks will eventually generate heat. Suppose one administers Zhongjing’s Sini Tang (Frigid Extremities Decoction) or similar formulas; follow the aforementioned principle. If the patient is not irritable, the hot medicine can be taken warm. However, if there is post-purgation irritability and incessant thirst for cold drinks, this aligns with the principle of injury from Cold where the patient prefers cold drinks.
The above case originally involved a Yang Syndrome mismanaged by purgation, transforming into a Yin Syndrome. It is not irritability caused by Yang Qi ascending, but rather irritability caused by Yang Qi sinking, resembling the Fu Yin (Hidden Yin) pulse. Shuhe (Wang Shuhe) stated: A short pulse indicates Hidden Yang within Yin.
Haicang stated: Taking hot medicine cold is suitable when there is Hidden Yang inside; however, if the pulse is already deficient and completely powerless upon palpation, or if the patient has historically lacked nourishment, the medicine should only be taken warm. Otherwise, the Yin Qi will fail to ferment and restore Yang, and the consequences would be severe.