〔海〕头汗出，剂颈而还，血证也。额上偏多何谓也？曰∶首者，六阳之所会也，故热熏蒸而
汗出也。额上偏多，以部分，左颊属肝，右颊属肺，鼻属中州，颐属肾，额属心。三焦之火涸其肾
水，沟渠之余迫而上，入于心之分，故发为头汗，而额上偏多者，属心之部，而为血证也。饮酒饮食
头汗出者，亦血证也。至于杂证，相火迫肾水上行入于心，为盗汗，或自汗，传而为头汗出者，或
心下痞者，俱同血证例治之。无问伤寒杂病酒积，下之而心下痞者，血证也。何以然？曰∶下之
亡阴，亡阴者，则损脾胃而亡血，气在胸中以亡其血，陷之于心之分也，故心下痞。世人以为血
病，用气药导之，则痞病愈甚。而又下之，故变而为中满彭胀，非其治也。如此然当作何治？
独益中州脾土，以血药治之，其法无以加矣。
一男子手足汗，医用芩、连、柏并补剂皆不效，又足汗常多，后以八物半苓为君，白附、
川乌佐使，其汗
即无。
〔《本》〕治脚汗。
白矾 干葛（各等分）
上二味为末，每半两，水三碗，煎十数沸洗，逐日一次，缠三五日自然无汗。
〔《灵》〕夺血者无汗，夺汗者无血。（荣卫生会篇）
〔垣〕真气已亏，胃中火盛，汗出不休，胃中真气已竭。若阴火已衰，无汗反燥，乃阴中之阳，
阳中之阳俱衰，四时无汗，其形不久，湿衰燥旺，理之常也。其形不久者，秋气主杀，生气乃竭。
生气者，胃之谷气也，乃春少阳生化之气也。
〔丹〕盛夏浴食无汗者，为表实。（见心痛表里条。）
杨顺二官子，患脉涩而短，重取而弱，此久受湿伤血，多年无汗，遇劳身热倦怠，如沙病状。
苍术 白术 芍药（各半两） 陈皮（六两） 归身（二两） 甘草 红花（各半两）
分六帖，姜三片，煎服。
谢老形实，夏月无汗，成久嗽病。
半夏 苏叶
二味为末，入莎末、枕流末、仁陷末，以栝蒌穣、桃仁泥半两为丸，先服三拗汤三帖，
却服此丸子。（详枕流末，蚬壳灰、蛤粉之类。仁陷末，神曲也。）
〔《甲》〕汗不出，曲差主之。
【海藏】头部出汗，仅到颈部即止，属于血证。为什么额头部位出汗偏多呢？回答说：头部是六条阳经汇聚的地方，所以热气熏蒸导致出汗。额头出汗偏多，是因为身体各部位与脏腑有对应关系：左脸颊属肝，右脸颊属肺，鼻子属中州（脾胃），下巴属肾，额头属心。三焦之火耗竭了肾水，沟渠中的余邪逼迫上行，进入心的所属区域，因此发生头汗，而额头出汗偏多的原因，是因为这里属于心的部位，所以归属于血证。饮酒或进食后头部出汗的，也属于血证。至于其他杂病，如果是相火逼迫肾水上行进入心中，导致盗汗（夜间睡眠时出汗）或自汗（白天不因劳累、炎热而自然出汗），进而发展为头汗出，或者伴有心下痞满（胃脘部堵塞感）的，都按照血证的例子来治疗。无论是伤寒、杂病还是酒积，经过泻下治疗后出现心下痞满的，也是血证。为什么会这样呢？回答说：泻下法损伤阴液，阴液亡失则损伤脾胃并导致亡血，气在胸中因失去血液的依附，陷落于心的所属区域，所以导致心下痞满。世人误认为是血病，使用理气药疏导，反而使痞满病症加重。如果再使用泻下法，就会变成为中满腹胀，这不是正确的治疗方法。像这样的情况应当如何治疗？只有补益中州的脾土，用补血药来治疗，这种方法没有比这更好的了。
一名男子手足出汗，医生使用黄芩、黄连、黄柏以及补剂均无效，且足部出汗常常较多，后来以八物汤合半苓汤为主方，白附子、川乌为佐使药，其汗症随即消失。
【《本草》】治疗脚汗。
白矾 干葛（各等分）
将这两味药研成粉末，每次取半两，用水三碗，煎煮十几沸后用来清洗，每天一次，缠裹三五天后自然不再出汗。
【《灵枢》】夺血者无汗，夺汗者无血。（出自《营卫生会篇》）
【李东垣】真气已经亏损，胃中火盛，汗出不止，说明胃中真气已竭。如果阴火已经衰退，不出汗反而干燥，这是阴中之阳、阳中之阳都衰退的表现，四季都不出汗，人的形体寿命不会长久，湿衰燥旺，是常理。说寿命不长久，是因为秋气主杀伐，生气于是枯竭。生气，就是胃中的谷气，也就是春季少阳生发的生化之气。
【朱丹溪】盛夏洗澡或进食时无汗的，属于表实。（见心痛表里条。）
杨顺两位官员的儿子，患脉象涩而短，重按则弱，这是长期受湿气伤害血液，多年无汗，遇到劳累就身体发热倦怠，症状如同沙病（一种慢性消耗性疾病）。
苍术 白术 芍药（各半两） 陈皮（六两） 当归身（二两） 甘草 红花（各半两）
分为六帖，加生姜三片，煎服。
谢老先生体质壮实，夏季无汗，形成了长期的咳嗽病。
半夏 苏叶
将这两味药研成粉末，加入莎草末、枕流末、仁陷末，用瓜蒌瓤、桃仁泥半两制成丸药，先服用三拗汤三帖，然后服用此丸药。（详细说明：枕流末，指蚬壳灰、蛤粉之类；仁陷末，指神曲。）
【《甲乙经》】汗不出，取曲差穴主治。
[Hai Zang] Sweating on the head that stops at the neck is a blood syndrome. Why is sweating more prominent on the forehead? The answer is: The head is the convergence point of the six Yang meridians, so heat steaming causes sweating. Sweating is more prominent on the forehead because different body parts correspond to specific organs: the left cheek corresponds to the Liver, the right cheek to the Lung, the nose to the Central Region (Spleen and Stomach), the chin to the Kidney, and the forehead to the Heart. Fire in the Sanjiao depletes Kidney Water, and residual pathogens from the channels force their way upward into the region belonging to the Heart, thus causing head sweating. The prominence of sweating on the forehead belongs to the Heart's region and is therefore classified as a blood syndrome. Head sweating after drinking alcohol or eating also belongs to a blood syndrome. As for other miscellaneous diseases, if Ministerial Fire forces Kidney Water upward into the Heart, causing night sweats (sweating during sleep) or spontaneous sweating (sweating without exertion or heat), which then develops into head sweating, or is accompanied by epigastric fullness (a sensation of blockage in the stomach area), all should be treated according to the principles for blood syndromes. Whether it is Cold Damage, miscellaneous diseases, or alcohol accumulation, if epigastric fullness occurs after purgation, it is also a blood syndrome. Why is this? The answer is: Purgation damages Yin fluids; loss of Yin fluids damages the Spleen and Stomach and leads to loss of Blood. Qi in the chest, having lost its blood foundation, sinks into the region belonging to the Heart, thus causing epigastric fullness. People mistakenly believe it is a blood disease and use Qi-regulating drugs to guide it, which worsens the fullness. If purgation is used again, it transforms into abdominal distension and bloating, which is not the correct treatment. How should such cases be treated? One must only tonify the Earth of the Central Region (Spleen) and treat with blood-nourishing herbs; there is no better method than this.
A male patient had sweating on his hands and feet. Physicians used Huangqin (Scutellariae Radix), Lianlian (Coptidis Rhizoma), Bailan (Phellodendri Cortex), and tonics without effect, and foot sweating was particularly profuse. Later, using Bawu Tang combined with Banling Tang as the principal formula, with Baifu Zi (Aconiti Kusnezoffii Radix Preparata) and Chuanwu (Aconiti Radix) as assistant and guiding drugs, the sweating ceased immediately.
[Ben Cao] Treatment for foot sweating.
Baifan (Alum) Gan Ge (Puerariae Lobatae Radix) (equal parts)
Grind these two ingredients into powder. Take half tael each time, boil in three bowls of water for about ten boils, and wash with the decoction. Do this once daily, wrap/bind for three to five days, and sweating will naturally cease.
[Ling Shu] Those who have lost blood do not sweat; those who have lost sweat do not lose blood. (From the Chapter Ying Wei Sheng Hui)
[Li Dongyuan] When True Qi is already deficient and Stomach Fire is excessive, continuous sweating indicates that True Qi in the Stomach is exhausted. If Ministerial Fire has declined, leading to dryness without sweating, it signifies the decline of Yang within Yin and Yang within Yang. Absence of sweating in all four seasons implies a short lifespan. Decline of dampness and excess of dryness is the normal order. The implication of a short lifespan arises because Autumn Qi governs killing/drying, causing Sheng Qi (Vitality/Qi of growth) to exhaust. Sheng Qi refers to the grain Qi of the Stomach, which is the generating Qi of Spring Shaoyang.
[Zhu Danxi] Absence of sweating during bathing or eating in midsummer indicates Exterior Excess. (See the section on Pain in the Heart: Exterior and Interior.)
The son of Official Yang Shun suffered from a choppy and short pulse, weak upon heavy pressure. This resulted from long-term damage to Blood by Dampness, causing absence of sweating for many years. Upon exertion, he experienced fever and fatigue, resembling symptoms of Sha Bing (a chronic wasting disease).
Cang Zhu (Atractylodis Rhizoma) Bai Zhu (Atractylodis Macrocephalae Rhizoma) Shao Yao (Paeoniae Radix Alba) (each half tael) Chen Pi (Citri Reticulatae Pericarpium) (six taels) Dang Gui Shen (Angelicae Sinensis Radix - root portion) (two taels) Gan Cao (Glycyrrhizae Radix et Rhizoma) Hong Hua (Carthami Flos) (each half tael)
Divide into six doses. Add three slices of fresh ginger, decoct, and take orally.
Old Man Xie had a robust constitution but no sweating in summer, leading to chronic cough.
Ban Xia (Pinelliae Tuber) Su Ye (Perillae Folium)
Grind these two into powder. Add Sha Cao Mo (Carex/Miscellaneous grass powder), Zhen Liu Mo (Pillow Stream Powder - see note), Ren Xian Mo (God Qu/Powdered Medicated Leaven - see note). Form pills using Gua Lou Rang (Trichosanthis Pericarpium pulp) and Tao Ren (Persicae Semen) paste, half tael each. First, administer San Ao Tang for three doses, then take these pills. (Detailed explanation: Zhen Liu Mo refers to things like Xiàn Qiè Huī (Clam Shell Ash) and Ha Fen (Tridacnidae Testum); Ren Xian Mo refers to Shen Qu (Medicated Leaven).)
[Jia Yi Jing] For absence of sweating, Qu Cha (BL17) is indicated.