暑气之中人也，每乘虚而入。人当盛暑之时，往往热郁于内，元气先伤。及偶被外邪束闭，而内热不
宣，气愈耗而津愈伤，则热病作矣。其证发热恶寒，口渴心烦，面赤齿燥，小水赤，脉洪而虚，纯属表里俱热
之证。如舌白口渴无汗，邪在气分，而表实者，以防翘桑杏汤主之。如舌赤口渴无汗，邪在血分而表实者，
以防翘桑杏汤，去银花、杏仁、滑石、豆豉，加生地、丹皮、白芍主之。如大汗大渴，脉虚大而芤，热在气
分而表虚者，以人参白虎汤主之。如舌赤口渴汗多，热在血分而表虚者，以加减生脉散主之。如入阳明，脉洪
滑，面赤身热，头晕不恶寒，但恶热，舌苔黄滑，渴欲饮水，得水反呕，按之胸下痛，小便短，大便闭，水
结在胸者，以小陷胸汤加枳实主之。如入阳明，脉滑数，不食不饥不便，浊痰凝聚，心下痞者，以半夏泻心
汤，去人参、干姜、大枣、甘草、加枳实，杏仁主之。如入阳明，湿气已化，热结独存，口燥咽干，渴欲饮
水，面目俱赤，舌燥黄、脉沉实者，以小承气汤，各等分下之。此专治暑热之法。如伏暑停食，以致吐泻
者，仍属寒证，应以霍乱之法治之。如暑月伤寒，而内本无热者，仍以伤寒法治之。
防翘桑杏汤
连翘（三钱） 银花（三钱） 桔梗（二钱） 桑叶（二
钱） 竹叶（一钱） 甘草（二钱） 防风（三钱） 豆豉（一钱五分） 杏仁（三钱） 滑石（三钱）
以鲜芦根汤煎服，香气大出，即取服，勿过煮。病不解，再作服。呕而痰多者，加半夏、茯苓。小便
短，加薏仁。
防翘桑杏汤去银花杏仁滑石豆豉加生地丹皮白芍方
连翘（三钱） 桔梗（二钱） 桑叶（二钱）
竹叶（一钱） 甘草（二钱） 防风（三钱） 生地（二钱） 丹皮（一钱） 白芍（二钱） 服法如前。
人参白虎汤
石膏（五钱研） 知母（三钱） 甘草（二钱） 粳米（半杯） 人参（三钱） 水煎
大半杯，温服。
加减生脉散方
沙参（三钱） 麦冬（三钱） 五味子（一钱） 丹皮（一钱） 生地（三钱） 水
煎大半杯，温服。
小陷胸加枳实汤
黄连（二钱） 栝蒌（三钱） 枳实（二钱） 半夏（五钱） 急流水煎大半杯
，温服。
半夏泻心汤去人参干姜大枣甘草加枳实杏仁方
半夏（五钱） 黄连（一钱） 黄芩（二钱） 枳实
（二钱） 杏仁（三钱） 水煎大半杯，温服。虚者，复纳人参二钱，大枣三枚。
小承气汤
大黄（三钱） 浓朴（三钱） 枳实（三钱） 水煎大半杯，温服。
When the pathogenic factor of Summerheat invades the human body, it often takes advantage of deficiency to enter. During the peak of summer heat, people often have heat stagnating internally, and their Yuan Qi (Original Qi) is damaged first. If they are occasionally constrained by external pathogens, causing internal heat to fail in being dispersed, Qi will be further exhausted and Body Fluids further injured, resulting in the onset of Heat disease. The manifestations include fever and aversion to cold, thirst and irritability, red face and dry teeth, dark urine, and a flooding yet empty pulse. This belongs entirely to a syndrome of Heat in both the exterior and interior.
If the tongue coating is white, there is thirst but no sweating, indicating the pathogen is in the Qi Level with an Excess pattern at the exterior, Fangfeng Qiao Sang Xing Tang (Wind-Proofing Forsythia Mulberry Leaf Apricot Kernel Decoction) should be used as the primary formula. If the tongue body is red, there is thirst but no sweating, indicating the pathogen is in the Blood Level with an Excess pattern at the exterior, Fangfeng Qiao Sang Xing Tang should be modified by removing Jin Yin Hua (Lonicerae Flos), Xing Ren (Armeniacae Semen Amarum), Hua Shi (Talcum), and Dou Chi (Sojae Semen Praeparatum), and adding Sheng Di Huang (Rehmanniae Radix), Dan Pi (Moutan Cortex), and Bai Shao (Paeoniae Radix Alba). If there is profuse sweating and extreme thirst, with a large, empty, and knotted (Kou) pulse, indicating Heat in the Qi Level with a Deficiency pattern at the exterior, Renshen Bai Hu Tang (Ginseng White Tiger Decoction) should be used. If the tongue body is red, there is thirst and profuse sweating, indicating Heat in the Blood Level with a Deficiency pattern at the exterior, Jiajian Sheng Mai San (Modified Pulse-Nourishing Powder) should be used.
If the pathogen enters the Yangming channel, presenting with a flooding and slippery pulse, red face, body heat, dizziness, aversion to heat but not aversion to cold, yellow and slippery tongue coating, desire for water, vomiting after drinking water, pain upon pressing the hypochondrium/epigastrium, short urine, and constipation, this indicates Water accumulation in the chest. Xiao Xian Xiong Tang (Minor Inverted Chest Decoction) with Zhi Shi (Aurantii Fructus Immaturus) added should be used. If the pathogen enters the Yangming channel, presenting with a slippery and rapid pulse, loss of appetite, lack of hunger, inability to defecate, congealed turbid phlegm, and epigastric fullness/stuffiness, Banxia Xi Xin Tang (Pinellia Heart-Draining Decoction) should be used, modifying by removing Renshen (Ginseng Radix), Gan Jiang (Zingiberis Rhizoma), Da Zao (Jujubae Fructus), and Gan Cao (Glycyrrhizae Radix et Rhizoma), and adding Zhi Shi (Aurantii Fructus Immaturus) and Xing Ren (Armeniacae Semen Amarum). If the pathogen enters the Yangming channel, dampness has transformed, leaving only heat accumulation, presenting with dry mouth and throat, desire for water, redness of the face and eyes, dry and yellow tongue coating, and deep and solid pulse, Xiao Cheng Qi Tang (Minor Order the Qi Decoction) should be used with equal parts of each herb to purge the heat. This is a specific method for treating Summerheat-Heat.
If latent Summerheat combined with food stagnation leads to vomiting and diarrhea, it still belongs to a Cold syndrome and should be treated according to the methods for Huoluan (Cholera-like disorder). If in the summer month one contracts Cold damage (Shanghan), but there is no internal heat, it should still be treated according to the methods for Shanghan.
Fangfeng Qiao Sang Xing Tang: Lian Qiao (Forsythiae Fructus) 3 qian, Yin Hua (Lonicerae Flos) 3 qian, Jie Geng (Platycodonis Radix) 2 qian, Sang Ye (Mori Folium) 2 qian, Zhu Ye (Bambusae Folium) 1 qian, Gan Cao (Glycyrrhizae Radix et Rhizoma) 2 qian, Fang Feng (Saposhnikoviae Radix) 3 qian, Dou Chi (Sojae Semen Praeparatum) 1.5 qian, Xing Ren (Armeniacae Semen Amarum) 3 qian, Hua Shi (Talcum) 3 qian. Decoct with fresh Lu Gen (Phragmitis Rhizoma) decoction; take when the aroma is strong, do not over-boil. If the disease does not resolve, prepare again. For vomiting with excessive phlegm, add Ban Xia (Pinelliae Rhizoma) and Fu Ling (Poria). For short urine, add Yi Yi Ren (Coicis Semen).
Formula of Fangfeng Qiao Sang Xing Tang without Yin Hua, Xing Ren, Hua Shi, Dou Chi, plus Sheng Di Huang, Dan Pi, Bai Shao: Lian Qiao 3 qian, Jie Geng 2 qian, Sang Ye 2 qian, Zhu Ye 1 qian, Gan Cao 2 qian, Fang Feng 3 qian, Sheng Di Huang 2 qian, Dan Pi 1 qian, Bai Shao 2 qian. Administration as above.
Renshen Bai Hu Tang: Shi Gao (Gypsum Fibrosum) 5 qian (crushed), Zhi Mu (Anemarrhenae Rhizoma) 3 qian, Gan Cao 2 qian, Jing Mi (Oryza Sativa) half cup, Renshen 3 qian. Decoct with water to half cup, take warm.
Jiajian Sheng Mai San Formula: Sha Shen (Glehniae Radix or Adenophorae Radix) 3 qian, Mai Dong (Ophiopogonis Tuber) 3 qian, Wu Wei Zi (Schisandrae Fructus) 1 qian, Dan Pi 1 qian, Sheng Di Huang 3 qian. Decoct with water to half cup, take warm.
Xiao Xian Xiong Tang with Zhi Shi: Huang Lian (Coptidis Rhizoma) 2 qian, Gua Lou (Trichosanthis Fructus) 3 qian, Zhi Shi 2 qian, Ban Xia 5 qian. Decoct with fast-flowing water to half cup, take warm.
Banxia Xi Xin Tang without Renshen, Gan Jiang, Da Zao, Gan Cao, plus Zhi Shi, Xing Ren: Ban Xia 5 qian, Huang Lian 1 qian, Huang Qin (Scutellariae Radix) 2 qian, Zhi Shi 2 qian, Xing Ren 3 qian. Decoct with water to half cup, take warm. For deficiency patterns, add Renshen 2 qian and Da Zao 3 pieces.
Xiao Cheng Qi Tang: Da Huang (Rhei Radix et Rhizoma) 3 qian, Nong Po (Magnoliae Officinalis Cortex) 3 qian, Zhi Shi 3 qian. Decoct with water to half cup, take warm.