人受暑热之毒。栖伏三焦肠胃之间。久久而发者。为伏暑。如霍乱吐泻。发于秋间。
以及疟痢等证。又如昔人云。三伏之时。以夏晒曝烈日之中。随即收藏于笥。火气
未散。冬时启笥。触之遂病。明者细询其因。以香薷饮服之立愈。
伏暑霍乱腹痛泄泻。正气散。身热足冷。势危者。五苓散下来复丹。
病患忽然手足搐挛者。暑风也。香薷饮加羌活、防风。呕吐加藿香、陈皮。小便不利
加茯苓、泽泻、猪苓、滑石。有痰加姜半夏。渴者去半夏加栝蒌根。泻利不止加白术。
转筋加木瓜。腹满身重。难以转侧。口不仁而面垢谵语遗溺者。此热兼 也。白虎汤。
更有痛势重者。手足搐挛。厉声呻吟。角弓反张。如中恶状。亦有先病热。服表散后渐成风者。
谵语狂呼浪走。气力百倍。此暑风也。以寒凉攻劫之。与阴风不同。宜解散化痰。不宜汗下。
日久而脾胃弱者。兼温补。
凡痈疽毒疮。发热有时。晡甚旦止。若夏月间有头面外项赤肿。或咽喉肿痛。或腿
足肿。长至数寸。不能步履。人皆疑为毒疮。但头痛内燥。昼夜发热不止。自与疮
毒不同。服败毒散、石膏、黄连等药。热证一解。赤肿自消。全无脓血。此名暑疡。与外科毫厘千里者也。
盛暑之月。火能烁金。不禁辛酒。脾火暴甚。劳热躁扰。火动心脾。令人咳嗽气喘。骤
然吐血衄血。头目不清。胸膈烦渴不宁。即童稚老夫。间有此病。昧者以为劳瘵。不
知火载血上。非真阴亏损。而为虚劳者比也。宜四物去芎、芍。黄连解毒去黄柏。二
陈以贝母易半夏。加桔梗以抑之。薄荷以散之。麦冬、五味以敛之。自愈。或黄连香薷饮亦可。
人感受暑热之毒，潜伏在三焦和肠胃之间，时间久了才发作的，称为伏暑。比如霍乱引起的吐泻，在秋季发作；以及疟疾、痢疾等证候。又如同古人所说：在三伏天时，将衣物暴露在烈日下暴晒，随即收藏入箱笥之中，火气尚未消散，到了冬天打开箱笥接触这些衣物便致病。明理之人仔细询问病因，服用香薷饮即可立即痊愈。
伏暑引起的霍乱、腹痛、泄泻，可用正气散治疗；身体发热、足部发冷，病情危重的，用五苓散送下来复丹。
病患突然手足抽搐痉挛的，是暑风。用香薷饮加羌活、防风；呕吐的加藿香、陈皮；小便不利的加茯苓、泽泻、猪苓、滑石；有痰的加姜半夏；口渴的去半夏加栝蒌根（天花粉）；泄泻不止的加白术；转筋（肌肉痉挛）的加木瓜。腹部胀满、身体沉重、难以翻身转动、口舌不知味且面色垢浊、说胡话、遗尿的，这是热邪兼夹湿邪（原文“兼 ”应为“兼湿”或类似含义，结合语境及白虎汤主治，此处指湿热或热盛伤津伴湿，但白虎汤主清气分热，若兼湿通常需化湿，此处依原文直译并保留术语），用白虎汤治疗。
更有疼痛剧烈的，手足抽搐痉挛，大声呻吟，角弓反张（背部肌肉强直使身体向后弯曲如弓状），像中恶邪一样。也有先患热病，服用解表发散药后逐渐形成风的。出现说胡话、狂呼乱跑、力气倍增，这是暑风。应当用寒凉药物攻逐劫夺，这与阴风不同，适宜解散表邪、化痰，不宜使用发汗或攻下法。日久导致脾胃虚弱的，兼用温补法。
凡是痈疽毒疮，发热有定时，傍晚加重早晨停止。如果在夏季出现头面、颈项红肿，或者咽喉肿痛，或者腿足肿胀长达数寸，不能行走，人们都怀疑是毒疮。但是伴有头痛、内部燥热，昼夜发热不停，这自然与疮毒不同。服用败毒散、石膏、黄连等药物，热证解除后，红肿自然消退，完全没有脓血，这叫做暑疡（暑热引起的疮疡），与外科常见的疮毒截然不同。
盛夏月份，火热之气能灼伤肺金（肺属金），如果不禁止辛辣和饮酒，脾火暴烈亢盛，劳热烦躁扰动，火动心脾，令人咳嗽气喘，骤然吐血、鼻出血，头目不清爽，胸膈烦闷口渴不安。即使是儿童老人，偶尔也有此病。不明事理的人以为是劳瘵（肺结核等慢性消耗性疾病），不知道这是火载血上行，并非真正的阴液亏损，不能与虚劳相比。宜用四物汤去掉川芎、芍药，黄连解毒汤去掉黄柏，二陈汤以贝母代替半夏，加桔梗以宣降肺气，薄荷以疏散风热，麦冬、五味子以收敛肺气，自愈。或者黄连香薷饮也可以。
When a person is infected by the toxic heat of summer-heat, which lies dormant between the Sanjiao (Triple Burner) and the intestines and stomach, and manifests after a long period, it is called latent summer-heat (Fu Shu). Examples include cholera-like vomiting and diarrhea occurring in autumn, as well as malaria and dysentery syndromes. As ancients stated: during the three Fu days (the hottest period of summer), if clothes are exposed to the scorching sun and then immediately stored in a chest, the fire energy remains trapped. When opened in winter, contact with these clothes causes illness. Those who understand this will inquire into the cause and administer Xiangru Yin (Elsholtzia Decoction), resulting in immediate recovery.
For latent summer-heat presenting as cholera with abdominal pain and diarrhea, Zhengqi San (Righteous Qi Powder) should be used. For cases with body heat and cold feet indicating critical condition, Wuling San (Five-Ingredient Powder with Poria) followed by Laifu Dan (Reviving Life Pill) is indicated.
If a patient suddenly experiences spasms and convulsions of the hands and feet, it is termed Summer-Heat Wind (Shu Feng). Treat with Xiangru Yin (Elsholtzia Decoction) added with Qianghuo (Notopterygii Rhizoma et Radix) and Fangfeng (Saposhnikoviae Radix). For vomiting, add Huoxiang (Pogostemonis Herba) and Chenpi (Citri Reticulatae Pericarpium). For difficult urination, add Fuling (Poria), Zexie (Alismatis Rhizoma), Zhuling (Polyporus), and Huashi (Talcum). For phlegm, add Jiang Banxia (Pinelliae Rhizoma Praeparatum cum Zingibere et Alumine). If thirsty, remove Banxia and add Gualougen (Trichosanthis Radix). For persistent diarrhea, add Baizhu (Atractylodis Macrocephalae Rhizoma). For muscle cramps (Zhuan Jin), add Mugua (Chaenomelis Fructus). For abdominal fullness, heaviness of the body, difficulty turning over, insensitivity of the mouth and face, delirium, and urinary incontinence, this indicates heat combined with dampness (or heat dominating); treat with Baihu Tang (White Tiger Decoction).
In more severe cases with intense pain, spasms of limbs, loud groaning, opisthotonos (body bent backward like a bow), resembling poisoning by evil qi, or cases where initial heat disease transforms into wind after taking diaphoretic agents, manifesting as delirium, wild shouting, running aimlessly, and excessive strength, this is also Summer-Heat Wind. It should be treated with cold-natured purgatives to attack and relieve the pathogen. This differs from Yin Wind; it is suitable for resolving the exterior and transforming phlegm, but not for sweating or purging methods. If the condition persists and weakens the Spleen and Stomach, warm tonification should be added.
Regarding carbuncles, ulcers, and toxic sores that present with fever at specific times—worse in the evening and stopping in the morning—if there is redness and swelling on the head, face, and neck, or sore throat, or leg and foot swelling extending several inches preventing walking, people often suspect toxic sores. However, accompanied by headache and internal dryness/heat, with continuous day-and-night fever, this differs from typical sores. Taking Baidu San (Detoxifying Powder), Shigao (Gypsum Fibrosum), Huanglian (Coptidis Rhizoma), etc., resolves the heat syndrome, and the redness and swelling subside spontaneously without pus or blood. This is named Summer-Heat Ulcer (Shu Yang), which is vastly different from surgical sores.
In the height of summer, fire can scorch Metal (Lung). If one does not abstain from pungent foods and alcohol, Spleen Fire becomes violently excessive. Labor-induced heat and restlessness stir Heart and Spleen Fire, causing cough, asthma, sudden hematemesis (vomiting blood), and epistaxis (nosebleed), unclear head and eyes, and restless chest oppression with thirst. Even children and the elderly may occasionally suffer this. Ignorant people mistake it for Lao Zhai (Consumption/Tuberculosis), not realizing that fire carrying blood upward is not true Yin deficiency comparable to Xu Lao (Deficiency Consumption). The prescription should be Siwu Tang (Four Substance Decoction) removing Chuanxiong (Chuanxiong Rhizoma) and Shaoyao (Paeoniae Radix Alba), Huanglian Jiedu Tang (Coptis Decoction for Resolving Toxicity) removing Huangbai (Phellodendri Cortex), Erchen Tang (Two-Cured Decoction) replacing Banxia with Beimu (Fritillariae Bulbus), adding Jiegeng (Platycodonis Radix) to direct Qi downward, Bohe (Menthae Haplocalycis Herba) to disperse, Maidong (Ophiopogonis Radix) and Wuweizi (Schisandrae Fructus) to astringe. Self-healing will occur. Alternatively, Huanglian Xiangru Yin (Coptis and Elsholtzia Decoction) is also suitable.