汗出发润及如油，或大如贯珠，着身出而不流者死。
发湿温汗，名曰重 死。乃人素有湿，因而中暑，暑温相搏。
自汗属太阴脾经，脾之真气随汗而泄，复以热药汗之，两热相攻，热旺脾
脱，口不能言，而耳聋身不知痛，身青面变而死，有白虎加苍术，救其在表里
者，可保十死一生。
睡中出，曰盗汗。
盗汗，邪气在半表半里也。
睡则卫气行于里，乘表中阳气不密，故自汗，觉则气散于表，故汗止。
头汗，邪热内蓄不得越，蒸于阳经，且头汗为里虚表实，玄府不开则阳气上
蒸于头。头汗则五脏枯干，心包络中空虚，至此则津液竭也，切勿下之，下之则
肠胃真气大泄，津液外亡，故曰重虚，凡头汗忌下。
一表也，头汗，往来寒热，宜柴胡桂枝干姜汤。
一半表半里，头汗，名曰阳微结则阳气衰而肠胃燥，大便秘结矣，宜小柴
胡，次与脾约丸润之。
又有胸胁满微结，小便不利，呕而渴，但头汗，往来寒热，及微恶寒、手足冷、
大便硬，脉细，亦是也。
一里也，头汗，名曰纯阴结，不热但烦渴，便秘不通，宜大柴胡下之，不热者，热在内。
热入血室，头汗，谵语，宜小柴胡加生地黄。
瘀热在里，渴而小便不利，发黄，头汗，宜茵陈五苓散。
阳明病，心下懊 ，宜栀子豆豉汤，吐其胸胃之邪也。
水结胸，头汗，心下紧满，宜小半夏加茯苓。
寒湿相搏，头汗，欲得被覆向火。
阳明被火。
虚烦。
If sweat causes the hair to become moist and oily, or if the sweat droplets are as large as beads strung together, adhering to the body without flowing off, death ensues.
If the hair is wet with warm sweat, it is termed *Chong* (Heavy/Severe), which also indicates a fatal condition. This occurs when a person previously had dampness in their constitution and subsequently contracted summerheat, causing summerheat and dampness to contend with each other.
Spontaneous sweating belongs to the Taiyin Spleen Meridian. The true Qi of the spleen escapes with the sweat. If hot diaphoretic medicines are then administered, the two heats attack each other; excessive heat leads to the collapse of Spleen Qi, resulting in an inability to speak, deafness, insensitivity of the body to pain, a bluish complexion, and death. In cases where both exterior and interior are affected, Baihu Jia Cangzhu Tang (White Tiger plus Atractylodis Rhizoma Decoction) may be used to rescue the patient, offering perhaps one chance in ten of survival.
Sweating during sleep is termed Night Sweats (Daohan).
Night sweats indicate that pathogenic factors are located at the Half-Exterior and Half-Interior.
During sleep, Wei Qi (Defensive Qi) travels inside the body. Taking advantage of the lack of solidity in the Yang Qi at the exterior and interior boundaries, spontaneous sweating occurs. Upon waking, Qi disperses to the exterior, so sweating stops.
Head sweating results from internal accumulation of pathogenic heat that cannot vent, steaming upwards into the Yang meridians. Furthermore, head sweating signifies Interior Deficiency and Exterior Excess. When the Xuanfu (pores) do not open, Yang Qi steams upward to the head. The appearance of head sweating indicates that the fluids of the Five Zang Organs are dried up and the Pericardium Collateral is hollow and empty; at this stage, body fluids are exhausted. Purging methods must strictly be avoided. If purging is used, the true Qi of the intestines and stomach will be severely depleted, and fluids will escape externally, hence it is called "Double Deficiency." All cases of head sweating contraindicate purging.
In cases of Exterior syndrome accompanied by head sweating and alternating chills and fever, Chaihu Guizhi Ganjiang Tang (Bupleurum, Cinnamon Twig, and Dried Ginger Decoction) is indicated.
In cases of Half-Exterior and Half-Interior syndrome accompanied by head sweating, termed "Yang Mild Obstruction," Yang Qi is declining while the intestines and stomach are dry, leading to constipation. Xiao Chaihu Tang (Minor Bupleurum Decoction) should be administered first, followed by Pi Yue Wan (Splee Restriction Pill) to moisten dryness.
There are also cases presenting with fullness and slight obstruction in the chest and hypochondrium, difficulty in urination, vomiting with thirst, only head sweating, alternating chills and fever, slight aversion to cold, cold hands and feet, hard stools, and a fine pulse; these also belong to this category.
In cases of Interior syndrome accompanied by head sweating, termed "Pure Yin Obstruction," there is no fever but there is irritability and thirst, along with constipation. Da Chaihu Tang (Major Bupleurum Decoction) should be used to purge. If there is no fever, it is because the heat is located internally.
When Heat enters the Blood Chamber, manifesting as head sweating and delirious speech, Xiao Chaihu Tang Sheng Dihuang Tang (Minor Bupleurum Decoction with Rehmanniae Radix) is indicated.
When Stagnant Heat resides in the interior, manifesting as thirst, difficulty in urination, jaundice, and head sweating, Yinchin Wuling San (Artemisiae Scopariae and Five-Ingredient Powder with Poria) is indicated.
In Yangming Disease, if there is oppression and restlessness in the epigastrium, Zhizi Chi Tang (Gardenia and Fermented Soybean Decoction) is indicated to expel pathogenic factors from the chest and stomach.
When Water obstructs the Chest, manifesting as head sweating and tight fullness in the epigastrium, Xiaobanxia Jia Fuling Tang (Minor Pinellia Decoction plus Poria) is indicated.
When Cold and Dampness contend, manifesting as head sweating, the patient desires to cover themselves and face fire for warmth.
Yangming disease treated incorrectly with Fire therapy.
Empty irritability.