薛己曰。仲景云、火入肺则烦。入肾则躁。夫心者。君火也。火旺则金燔水亏。而火独存。故肺肾合而为躁也。活
人云。但烦热者。虚烦也。诸虚烦热。与伤寒相似。但不恶寒。鼻不疼。故知非伤寒也。头不疼。脉不紧。故知非里寒
也。不可发汗攻下。当与竹叶汤。兼呕。橘皮汤。又心虚则先烦而后渴。翕翕发热。其脉浮紧而大是也。盖烦者。心中
烦扰为内热。故属阳。躁者。肢体躁动。或踝身为外热。故属阴。外热者。无根之火也。是以为虚。在小儿当辨其HT
煎不安。是烦。HT 不定。是躁。
HT煎者。心经有热。精神恍惚。烦满生惊。HT 者。心经有风。烦躁惊搐也。热甚者。黄连解毒汤。轻者。导赤
散。风热者。至宝丹。脉数而实。便闭者。神芎丸。此皆实热之治法也。若烦而头痛短气。口干咽燥。不渴者。虚也。
四君加芎归。烦不得眠。酸枣仁汤。面戴阳。目内赤。六脉洪大。按之全无者。血虚发躁。当归补血汤。若躁而踝体。
欲入并中。脉沉细或浮大。按之如无者。此皆阴盛发躁。宜参附汤。有回生之功也。
汉张仲景。创论伤寒。六经分治。阴阳并观。传变不一。贵探其原。表则易治。里岂易痊。三阳为表。里症常兼。
三阴为里。表症亦繁。病机叠出。不一其端。合并两感。欲辨难言。汗吐下法。不误则安。男妇大小。大概皆然。然而
小儿。还须另看。脏腑娇嫩。六气未完。外邪易犯。乳食多愆。一旦病至。身热如煎。头疼骨痛。合眼赤颧。或汗无汗。
发渴咽干。种种形症。病则相牵。谓为伤寒。宁曰否焉。然而幼稚。杂病多般。惊疳痰食。痘疹烦冤。总皆发热。躁扰
相干。设若误认。时日迁延。如大人法。治之必偏。百十三方。立毙下咽。如是死者。良属可怜。如是死者。医罪曷宽。
审音察色。详辨为先。内伤外感。务究其根。脉或罔据。三关细研。毋俾病势。变幻缠绵。再参疫疠。夏热春温。中风
中湿。暑 弥漫。认病毋错。方治求全。庶几是儿。寿保彭 。
薛己说：张仲景讲，火邪侵入肺脏则产生“烦”，侵入肾脏则产生“躁”。心属于君火，火气旺盛会导致肺金被灼烧、肾水亏虚，从而使得火邪独存。因此，肺和肾共同作用导致了“躁”的产生。《活人书》说：只有烦热症状的，属于虚烦。各种虚烦热的症状，与伤寒相似，只是不恶寒、鼻子不疼痛，所以知道不是伤寒。头部不疼痛、脉象不紧，所以知道不是里寒。不可以使用发汗或攻下的治法，应当给予竹叶汤。如果兼有呕吐，给予橘皮汤。另外，心气虚弱则会先出现烦，随后出现口渴，伴有微微发热，脉象浮紧而大。大概来说，“烦”是指心中烦乱扰攘，属于内热，所以归属于阳；“躁”是指肢体躁动不安，或者脚踝身体外部发热，所以归属于阴。外部的热，是无根之火，因此属于虚证。在小儿身上，应当辨别是HT煎（形容心神不安的样子）还是HT不定（形容神志不定的样子）。HT煎，是因为心经有热，导致精神恍惚，心中烦闷并易受惊；HT不定，是因为心经有风，导致烦躁、惊厥抽搐。热势严重的，用黄连解毒汤；轻症的，用导赤散；风热证的，用至宝丹；脉象数且实，大便闭结的，用神芎丸。这些都是治疗实热的方法。如果烦闷且头痛、气短，口干咽燥但不口渴的，属于虚证，用四君子汤加川芎、当归。心烦不得安眠的，用酸枣仁汤。面色泛红如戴阳，眼睛内部发红，六脉洪大但重按完全无力的，是血虚导致的发躁，用当归补血汤。如果躁动且脚踝身体寒冷，想要蜷缩在温暖的地方，脉象沉细或浮大但重按如无的，这是阴盛导致的发躁，适宜用参附汤，此方有起死回生的功效。
汉代的张仲景，创立了伤寒论，以六经分治，阴阳并观，病情传变不一，贵在探究其本源。表证容易治疗，里证岂能轻易痊愈？三阳经属于表，里证常常兼夹；三阴经属于里，表证也纷繁复杂。病机层层叠出，头绪众多。合并感邪或两感于寒，想要辨析难以言说。汗、吐、下三种治法，如果不失误就能平安。男女老少，大体情况都是如此。然而对于小儿，还需要另行看待。小儿脏腑娇嫩，六气尚未完备，外邪容易侵犯，乳食多有差错。一旦生病，身体发热如同煎熬，头疼骨痛，闭眼时颧骨发红。或者出汗或者无汗，发生口渴咽干。种种形态症状，疾病之间相互牵连。说是伤寒，难道不是吗？然而幼童杂病多种多样，惊风、疳积、痰食、痘疹引起的烦冤，总归都伴有发热，躁动干扰。如果误认病情，时日拖延，像对待大人的方法去治疗必然偏颇。一百一十三首方剂，服下必致死亡。这样的死者，确实可怜。这样的死者，医生的罪过怎能宽恕？审察声音和面色，详细辨析作为首要任务。内伤和外感，务必追究根本。脉象或许不可靠，要仔细研究指纹（三关）。不要让病势变幻缠绵。再参考疫病、夏季的热病、春季的温病、中风、中湿、暑气弥漫等。认识疾病不要出错，治疗方案求全。这样才可能保全孩子的寿命，使其长寿如彭祖。
Xue Ji stated: Zhang Zhongjing said, when fire enters the Lung, it causes Fan (restlessness); when it enters the Kidney, it causes Zao (agitation). The Heart is the Minister Fire. When fire is excessive, it scorches Metal (Lung) and depletes Water (Kidney), leaving fire to exist alone. Thus, the combination of Lung and Kidney results in Zao. The *Huoren* (Book of Vitality) states: cases with only Fan-heat are termed Xu-Fan (deficiency restlessness). Various Xu-Fan-heat symptoms resemble Shanghan (Cold Damage), but without aversion to cold or nasal pain, one knows it is not Shanghan. Without headache or a tight pulse, one knows it is not Interior Cold. Sweating (Fa-Han) and purging (Gong-Xia) methods should not be used; instead, Zhuye Tang (Bamboo Leaf Decoction) should be given. If accompanied by vomiting, Jupi Tang (Tangerine Peel Decoction) is indicated. Furthermore, Heart Qi deficiency leads to Fan first, followed by thirst, accompanied by slight fever and a pulse that is floating, tight, and large. Generally, Fan refers to mental restlessness due to internal heat, thus belonging to Yang; Zao refers to physical agitation or external heat at the ankles and body, thus belonging to Yin. External heat is "fire without root," hence it is deficiency. In children, one must distinguish between HT Jian (restless spirit) and HT Bu Ding (unstable spirit). HT Jian indicates Heat in the Heart Meridian, causing vague spirit, mental fullness, and fright; HT Bu Ding indicates Wind in the Heart Meridian, causing restlessness, fright, and convulsions. For severe heat, Huanglian Jiedu Tang (Coptis Decoction for Resolving Toxicity) is used; for mild cases, Daochi San (Guide Out Red Powder); for Wind-Heat, Zhibao Dan (Precious Treasure Pill); for rapid and solid pulses with constipation, Shenxiong Wan (Shenxiong Pill). These are all treatments for Excess-Heat. If there is Fan with headache, shortness of breath, dry mouth and throat but no thirst, it is Deficiency; Sijun Zi Tang (Four Gentlemen Decoction) plus Chuanxiong Danggui (Ligusticum and Angelica) is used. For Fan preventing sleep, Suanzaoren Tang (Sour Jujube Seed Decoction) is used. For facial flushing like Daiyang (wearing yang), red inner eyes, and large six-pulse positions that vanish upon deep pressure, it is Zao caused by Blood Deficiency; Danggui Buxue Tang (Angelica Tonifying Blood Decoction) is used. If there is Zao with cold ankles and body, desire to curl up in warmth, and a pulse that is deep and fine or floating and large but vanishes upon pressure, this is Zao caused by Excess-Yin; Shenfu Tang (Ginseng and Aconite Decoction) is appropriate, which has the merit of reviving the dying.
Zhang Zhongjing of the Han Dynasty created the Treatise on Cold Damage, dividing treatment by Six Channels, observing both Yin and Yang. Transmission varies, so it is crucial to explore the origin. Exterior patterns are easy to treat; how can Interior patterns be easily cured? The Three Yang channels belong to the Exterior, where Interior patterns often coexist; the Three Yin channels belong to the Interior, where Exterior patterns are also complex. Pathogenic mechanisms emerge in layers with many aspects. Combined infections or simultaneous exterior-interior involvement are difficult to describe. Sweating, emesis, and purging methods ensure safety if applied correctly. This generally applies to men, women, and all ages. However, for children, a different approach is needed. Their zang-fu organs are delicate, and the Six Qi are not yet complete; they are easily invaded by external pathogens and prone to dietary errors. Once illness strikes, the body heats up as if boiling, with headache and bone pain, red malar bones when eyes are closed. There may be sweating or no sweating, thirst and dry throat. Various symptoms interrelate. Is it Shanghan? Indeed, it might be. Yet children suffer from various miscellaneous diseases: fright, gan syndrome, phlegm-food retention, and distress from smallpox/rashes. All involve fever and agitated disturbance. Misdiagnosis leads to delay. Treating them like adults will inevitably lead to bias. Of the 113 formulas, using them incorrectly will cause death upon ingestion. Such deaths are pitiful. Such deaths, how can the physician's fault be forgiven? Listen to the voice and observe the complexion; detailed differentiation is paramount. Investigate the root of interior injury and exterior contraction. Pulse diagnosis may be unreliable; carefully examine the three finger sections (infantile pulse diagnosis). Do not let the disease condition become变幻 (changeable) and lingering. Also consider epidemics, summer heat, spring warmth, wind-stroke, dampness invasion, and pervasive summer heat. Recognize the disease without error and seek comprehensive treatment. Only then can the child's life be preserved, ensuring longevity like Peng Zu.