日三四五发者，谓之发热。寅卯太阳表也，桂枝麻黄；巳午少阳柴胡。
热在外也，若翕翕覆热而不炽，即风寒怫郁阳气所致。
热在内也，若火之蒸灼然而热，即阳气下陷入阴中，热先自里而表。
表里俱热，则半表半里也，但热有轻于纯在表者也。
不治症
阴阳俱虚，热不止者死。
下利热不止者死。
汗后复热而脉躁疾，狂言不能食，名曰阴阳交死，乃肾虚感邪，则阴邪与真阳交合，伏入于
心包络之间，先用三黄泻心汤加参附三服，和其心包。病若静，次用知母麻黄汤三服，开泄心包
之邪，又次用竹叶石膏汤，复其津液。
无时而歇，非比发热时发时止。
烦热与发热，二者俱表也。
曰病患烦热汗出而解；又曰发热已解，半日许复烦，再与桂枝汤；又曰，服桂枝反烦不解，
先刺风池、风府，再与桂枝。
发汗不入格病不解，宜再汗，汗后再伤风寒而热，宜再汗。
汗后温温而热，脉弦小而数，有余热也，宜和解之。
汗后温温而热，脉静身无痛处，虚热也，宜平补之。
汗后温温而热，或渴，或胸满，或腹急，有里证，脉沉数，宜下之。
风邪干卫，自汗表虚，脉浮而无力，桂枝和之。
暑邪干卫，中 自汗，恶寒身热而渴，脉虚，白虎主之。
湿邪干卫，多汗而厥，脉濡沉，此其风湿甚者，白虎加苍术。
风湿自汗，脉弦，宜葳蕤汤，彻其热也。
寒渐入里，传而为热，亦使自汗。
以上皆表邪未解也。
漏不止而恶风自汗亡阳，脉沉细，宜桂附汤温经，此表之虚也。
阳明发热，其汗如雨，则胃汁内干，急下之，下迟津液内涸，黑斑而死。
自汗脉沉数有力，宜下之。
柔 自汗，脉沉，宜小续命，散其风邪。
霍乱自汗，脉细紧，宜四逆回阳也。
少阴病反自汗，脉沉细，宜四逆汤，补其肾也。
Episodes occurring three to five times a day are termed *fa re* (fever). The Yin and Mao hours correspond to the Taiyang exterior syndrome, for which Guizhi Tang (Cinnamon Twig Decoction) or Mahuang Tang (Ephedra Decoction) are indicated; the Si and Wu hours correspond to the Shaoyang syndrome, for which Chaihu preparations are used.
When heat is in the exterior, if it feels like a mild, covering warmth without being intense, this is caused by Wind-Cold stagnating and obstructing Yang Qi.
When heat is in the interior, if it is scorching hot like steaming fire, this is due to Yang Qi sinking into the Yin, with heat originating from the interior and manifesting in the exterior.
When both exterior and interior are hot, it is a Half-Exterior Half-Interior syndrome, but the heat is milder than that purely in the exterior.
Incurable Syndromes
If Yin and Yang are both deficient and fever persists, the prognosis is fatal.
If diarrhea occurs with persistent fever, the prognosis is fatal.
If fever recurs after sweating, accompanied by a restless and rapid pulse, delirious speech, and inability to eat, it is named "Yin-Yang Jiao" (Intertwining of Yin and Yang), which is fatal. This results from Kidney deficiency allowing pathogenic factors to invade, where Yin pathogens combine with True Yang, lodging between the Pericardium Collaterals. Initially, Sanhuang Xiexin Tang (Three Yellows Draining the Heart Decoction) plus Renshen (Ginseng Root) and Fuzi (Aconite Lateralis Radix Preparata) should be administered for three doses to harmonize the Pericardium. If the condition stabilizes, Zhimu Mahuang Tang (Anemarrhena and Ephedra Decoction) should be given for three doses to vent the pathogens from the Pericardium. Subsequently, Zhuye Shigao Tang (Bamboo Leaf and Gypsum Decoction) should be used to restore Body Fluids.
An episode occurring once a day, ceasing between Wei and Shen hours, belongs to the Yangming syndrome and can be treated with purgation, as the heat has entered the Stomach.
The cessation of symptoms occurs at irregular intervals, unlike fever which comes and goes periodically.
Fan re (restless heat) and fa re (fever) both belong to exterior syndromes.
It is stated that when a patient experiences restless heat and sweating, the disease resolves; it is also stated that after fever resolves, if restlessness returns after half a day, Guizhi Tang should be administered again; furthermore, if administering Guizhi Tang fails to resolve the vexation, Fengchi (GB20) and Fengfu (GV16) acupoints should be needled first, followed by Guizhi Tang.
If sweating does not resolve the stubborn disease, another course of sweating is appropriate; if wind-cold invades again after sweating causing fever, another course of sweating is appropriate.
After sweating, if there is slight heat with a wiry, small, and rapid pulse, it indicates residual heat, and harmonization is appropriate.
After sweating, if there is slight heat with a calm pulse and no body pain, it is deficient heat, and gentle tonification is appropriate.
After sweating, if there is slight heat, or thirst, or chest fullness, or abdominal urgency, indicating interior signs, with a deep and rapid pulse, purgation is appropriate.
When Wind pathogens invade the Defensive level, causing spontaneous sweating and exterior deficiency with a floating and weak pulse, Guizhi Tang should be used to harmonize.
When Summerheat pathogens invade the Defensive level, causing spontaneous sweating, aversion to cold, body heat, and thirst with a deficient pulse, Baihu Tang (White Tiger Decoction) is the primary treatment.
When Dampness pathogens invade the Defensive level, causing excessive sweating and cold extremities with a soggy and deep pulse, this indicates severe Wind-Dampness, and Baihu Tang plus Cangzhu (Atractylodis Rhizoma) is indicated.
For Wind-Dampness causing spontaneous sweating with a wiry pulse, Weirui Tang (Juncus Decoction) is appropriate to clear the heat.
Cold gradually entering the interior and transforming into heat also causes spontaneous sweating.
All the above cases involve unresolved exterior pathogens.
If sweating leaks continuously with aversion to wind and spontaneous sweating leading to collapse of Yang, with a deep and fine pulse, Guifu Tang (Cinnamon and Aconite Decoction) should be used to warm the meridians; this is an exterior deficiency syndrome.
In Yangming fever, if sweating is profuse like rain, the Stomach fluids are internally dried up, requiring urgent purgation; delayed purgation leads to exhaustion of fluids, appearance of black spots, and death.
Spontaneous sweating with a deep, rapid, and forceful pulse requires purgation.
For Rouji (soft spasm) causing spontaneous sweating with a deep pulse, Xiao Xuming Tang (Minor Continuation of Life Decoction) is appropriate to disperse Wind pathogens.
For Huoluan (cholera-like disorder) causing spontaneous sweating with a fine and tight pulse, Sini Tang (Frigid Extremities Decoction) is appropriate to restore Yang.
In Shaoyin disease, spontaneous sweating appearing contrary to expectation, with a deep and fine pulse, Sini Tang is appropriate to tonify the Kidney.