〔大〕客热者，因体虚而将温过度，外热加之，非脏腑自生，故云客热。其状上焦
胸膈之间虚热，口燥心烦，手足壮热者是也。
〔薛〕前证若客邪所侵，用补中益气加川芎、防风。肝虚血少，六味地黄丸，胃火
饮冷，钱氏泻黄散。胃虚饮汤，七味白术散。潮热时热，八珍汤。晡热内热，逍遥散。发
热体倦，补中益气汤。恚怒发热，小柴胡汤。郁怒发热，加味归脾汤。寅卯酉戌时热，升
阳益胃汤。
〔大〕麦门冬散 治妇人客热，四肢烦闷疼痛，饮食不下。
麦门冬 赤茯苓 赤芍药 柴胡（各一钱半） 桑白皮 生地黄 黄 羚羊角屑（各一
钱） 甘草（半钱）
上作一服，水二盅，生姜三片，煎至一盅，不拘时服。
犀角散 治妇人客热，四肢烦闷疼痛，饮食不下。
犀角屑 赤芍药 地骨皮 赤茯苓 红花 人参 枳壳 麦门冬（各一钱） 柴胡（二钱）
黄（二钱半） 甘草（半钱）
上作一服，水二盅，生姜三片，煎至一盅，不拘时服。
黄 饮 治妇人客热，心胸壅闷，肢节烦疼，不思饮食。
黄 生地黄（各二钱） 人参 茯神（炒）
犀角屑 栝蒌仁 黄芩（各一钱） 甘草（半钱）
上作一服，水二盅，淡竹叶五片，煎至一盅，不拘时服。
丹砂散 治妇人客热，心神烦躁，口干舌涩，饮食无味。
丹砂（一两，细研，水飞过） 犀角屑 天竺黄 胡黄连（各半两） 麦门冬（去心焙，二两）
寒水石（细研） 马牙硝（细研，各一分） 铅霜（半两，细研）
上为细末，入研了药和匀，每以竹叶汤调下一钱，无时。
玉霜散 治妇人客热，烦渴头痛，痰涌如泉。
石膏（二两，细研，水飞过） 寒水石（一两，细研）
上和匀，每以生地黄汁调下一钱，无时。
生干地黄丸 治妇人客热，面赤头疼，口舌生疮，心胸烦壅，饮食无味。
生干地黄（一两） 羚羊角屑 白鲜皮 葳蕤（各半两） 黄连（去须，七钱半）
黄（炙微赤，半两） 麦门冬（二两，去心焙） 玄参 犀角屑 地骨皮 甘草（炙微赤，各半两）
川大黄（一两）
上为细末，炼蜜和捣二三百杵，丸如梧桐子大。每以温水下三十丸，无时。
败毒散 治妇人客热，四肢烦闷疼痛，不思饮食。甚者可加地骨皮、黄芩。（方见杂病伤湿。）
【戴元礼】所谓客热，是因为身体虚弱时过度使用温补药物，外加热邪侵袭所致，并非脏腑自身产生的热邪，所以称为客热。其症状表现为上焦胸膈之间感到虚热，口干舌燥，心烦意乱，手足高热等。
【薛己】上述病症如果是外邪入侵所致，可用补中益气汤加川芎、防风治疗。若是肝虚血少，用六味地黄丸；胃火旺盛且喜饮冷物，用钱氏泻黄散；胃气虚弱且喜饮热汤，用七味白术散；出现潮热或定时发热，用八珍汤；午后（晡时）发热及内热，用逍遥散；发热伴身体疲倦，用补中益气汤；因愤怒而发热，用小柴胡汤；因郁怒而发热，用加味归脾汤；在寅时、卯时、酉时、戌时发热，用升阳益胃汤。
【戴元礼】麦门冬散：治疗妇人客热症，四肢烦闷疼痛，饮食无法下咽。
药材组成：麦门冬、赤茯苓、赤芍药、柴胡（各一钱半），桑白皮、生地黄、黄芪、羚羊角屑（各一钱），甘草（半钱）。
用法：以上为一剂用量，加水两盅，生姜三片，煎煮至一盅，不拘时间服用。
犀角散：治疗妇人客热症，四肢烦闷疼痛，饮食无法下咽。
药材组成：犀角屑、赤芍药、地骨皮、赤茯苓、红花、人参、枳壳、麦门冬（各一钱），柴胡（二钱），黄芪（二钱半），甘草（半钱）。
用法：以上为一剂用量，加水两盅，生姜三片，煎煮至一盅，不拘时间服用。
黄芪饮：治疗妇人客热症，心胸壅塞闷痛，肢节烦疼，不想进食。
药材组成：黄芪、生地黄（各二钱），人参、茯神（炒制）、犀角屑、栝蒌仁、黄芩（各一钱），甘草（半钱）。
用法：以上为一剂用量，加水两盅，淡竹叶五片，煎煮至一盅，不拘时间服用。
丹砂散：治疗妇人客热症，心神烦躁，口干舌涩，饮食无味。
药材组成：丹砂（一两，细研，水飞法处理）、犀角屑、天竺黄、胡黄连（各半两），麦门冬（去心焙干，二两），寒水石（细研），马牙硝（细研），铅霜（半两，细研）。
用法：以上药物研为细末，将已研磨的药物混合均匀，每次取一钱，用竹叶汤调服，不拘时间。
玉霜散：治疗妇人客热症，烦渴头痛，痰涌如泉。
药材组成：石膏（二两，细研，水飞法处理），寒水石（一两，细研）。
用法：以上药物混合均匀，每次取一钱，用生地黄汁调服，不拘时间。
生干地黄丸：治疗妇人客热症，面红头痛，口舌生疮，心胸烦闷壅滞，饮食无味。
药材组成：生干地黄（一两），羚羊角屑、白鲜皮、葳蕤（各半两），黄连（去须，七钱半），黄芪（炙至微赤，半两），麦门冬（二两，去心焙干），玄参、犀角屑、地骨皮、甘草（炙至微赤，各半两），川大黄（一两）。
用法：以上药物研为细末，用炼蜜调和并捣杵二三百次，制成梧桐子大小的丸药。每次用温水送服三十丸，不拘时间。
[Dai Yuanli] "Ke Re" (Guest Heat) refers to heat caused by excessive use of warming and tonifying treatments in a body that is deficient, combined with external heat pathogens invading. It is not heat generated internally by the Zang-Fu organs themselves; hence it is termed "Guest Heat." Its manifestations include a sensation of deficiency-heat in the upper Jiao (Upper Burner), specifically between the chest and diaphragm, dry mouth, irritability, and high fever in the hands and feet.
[Xue Ji] For the aforementioned conditions: if caused by invasion of external pathogens, use Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction) with added Chuanxiong Rhizoma (Chuanxiong) and Fangfeng Radix Saposhnikoviae (Fangfeng). If due to Liver deficiency and blood insufficiency, use Liuwei Dihuang Wan (Six-Ingredient Rehmannia Pill). If there is Stomach fire accompanied by a preference for cold drinks, use Qian's Xiehuang San (Drain the Spleen Powder). If there is Stomach deficiency accompanied by a preference for hot soups, use Qiwei Baizhu San (Seven-Ingredient Atractylodes Macrocephala Powder). For tidal fever or periodic fever, use Bazhen Tang (Eight-Treasure Decoction). For afternoon (Bushi) fever and internal heat, use Xiaoyao San (Free and Easy Wanderer Powder). For fever accompanied by physical fatigue, use Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction). For fever induced by anger, use Xiao Chaihu Tang (Minor Blue Green Dragon Decoction). For fever induced by depression and anger, use Jiaweigui Pi Tang (Modified Heart-Spleen Tonifying Decoction). For fever occurring at Yin, Mao, You, and Xu hours, use Shengyang Yiwang Tang (Raise Yang and Benefit the Stomach Decoction).
[Dai Yuanli] Maimendong San (Ophiopogon Powder): Treats Ke Re (Guest Heat) in women, characterized by restlessness and pain in the four limbs, and inability to eat.
Ingredients: Maimendong (Ophiopogonis Tuber), Chi Fuling (Poria Cocos with Red Mycelium), Chi Shaoyao (Red Peony Root), Chaihu (Bupleuri Radix) (each 1.5 qian); Sangbaipi (Morus Alba Bark), Sheng Dihuang (Rehmanniae Radix), Huangqi (Astragali Membranacei Radix), Lingyangjiao Xie (Antelope Horn Shavings) (each 1 qian); Gancao (Licorice Root) (0.5 qian).
Usage: Take as one dose, add two cups of water and three slices of fresh ginger, decoct until one cup remains. Take at any time.
Xijiao San (Rhinoceros Horn Powder): Treats Ke Re (Guest Heat) in women, characterized by restlessness and pain in the four limbs, and inability to eat.
Ingredients: Xijiao Xie (Rhinocerotis Cornu Shavings), Chi Shaoyao (Red Peony Root), Digupi (Lycii Cortex), Chi Fuling (Poria Cocos with Red Mycelium), Honghua (Carthami Flos), Renshen (Ginseng Radix), Zhike (Aurantii Fructus Immaturus), Maimendong (Ophiopogonis Tuber) (each 1 qian); Chaihu (Bupleuri Radix) (2 qian); Huangqi (Astragali Membranacei Radix) (2.5 qian); Gancao (Licorice Root) (0.5 qian).
Usage: Take as one dose, add two cups of water and three slices of fresh ginger, decoct until one cup remains. Take at any time.
Huangqi Yin (Astragalus Drink): Treats Ke Re (Guest Heat) in women, characterized by oppression and stuffiness in the chest and heart, painful distension in the joints, and loss of appetite.
Ingredients: Huangqi (Astragali Membranacei Radix), Sheng Dihuang (Rehmanniae Radix) (each 2 qian); Renshen (Ginseng Radix), Fushen (Poria Cocos with Hostwood) (stir-fried), Xijiao Xie (Rhinocerotis Cornu Shavings), Gualouren (Trichosanthis Semen), Huangqin (Scutellariae Radix) (each 1 qian); Gancao (Licorice Root) (0.5 qian).
Usage: Take as one dose, add two cups of water and five leaves of Danzhuye (Lophatheri Herba), decoct until one cup remains. Take at any time.
Dansha San (Cinnabar Powder): Treats Ke Re (Guest Heat) in women, characterized by mental restlessness and irritability, dry mouth and stiff tongue, and loss of taste in food.
Ingredients: Dansha (Cinnabaris) (1 liang, finely ground, processed by water flotation), Xijiao Xie (Rhinocerotis Cornu Shavings), Tianzhuhuang (Calami Rhizoma), Huhuanglian (Coptidis Rhizoma) (each 0.5 liang); Maimendong (Ophiopogonis Tuber) (decored and baked, 2 liang); Hanshuishi (Calcitum) (finely ground), Mayaxiao (Natrii Sulfas) (finely ground), Qianshuang (Plumbi Subcarbonas) (0.5 liang, finely ground).
Usage: Grind all ingredients into a fine powder, mix thoroughly with the previously ground medicines. Take 1 qian each time, mixed with Zhu Ye Tang (Bamboo Leaf Decoction), at any time.
Yushuang San (Jade Frost Powder): Treats Ke Re (Guest Heat) in women, characterized by irritability, thirst, headache, and profuse phlegm secretion like a spring.
Ingredients: Shigao (Gypsum Fibrosum) (2 liang, finely ground, processed by water flotation), Hanshuishi (Calcitum) (1 liang, finely ground).
Usage: Mix evenly. Take 1 qian each time, mixed with Sheng Diguji (Fresh Rehmannia Juice), at any time.
Shenggan Dihuang Wan (Dried Rehmannia Pill): Treats Ke Re (Guest Heat) in women, characterized by red face, headache, sores in the mouth and tongue, mental restlessness and chest oppression, and loss of taste in food.
Ingredients: Shenggan Dihuang (Dried Rehmanniae Radix) (1 liang); Lingyangjiao Xie (Antelope Horn Shavings), Baixianpi (Dictamni Cortex), Weirui (Polygonati Odorati Rhizoma) (each 0.5 liang); Huanglian (Coptidis Rhizoma) (decored, 0.75 liang); Huangqi (Astragali Membranacei Radix) (stir-baked until slightly red, 0.5 liang); Maimendong (Ophiopogonis Tuber) (decored and baked, 2 liang); Xuanshen (Scrophulariae Radix), Xijiao Xie (Rhinocerotis Cornu Shavings), Digupi (Lycii Cortex), Gancao (Licorice Root) (stir-baked until slightly red, each 0.5 liang); Chuan Dahuang (Rhei Radix et Rhizoma) (1 liang).
Usage: Grind into a fine powder, mix with refined honey, and pound 200-300 times. Form pills the size of paulownia seeds. Take 30 pills each time with warm water, at any time.
Baidu San (Defeat Toxin Powder): Treats Ke Re (Guest Heat) in women, characterized by restlessness and pain in the four limbs, and loss of appetite. In severe cases, add Digupi (Lycii Cortex) and Huangqin (Scutellariae Radix). (See the section on Miscellaneous Diseases: Injury by Dampness for the formula.)