【因】热病热退之后。胃气尚虚。余邪未尽。先进清粥汤。次进浓粥汤。次进糜粥。亦须少少与之。切
勿任意过食也。若纳谷太骤。则运化不及。余邪假食滞而复作也。名曰食复。大抵强人足两月。虚弱人
足百日。则无复病矣。
【证】发热头痛。烦闷不纳。轻则日暮微烦。此食谷早。或多食故也。胃虚弱不能消谷食。宜损谷则愈。
甚则发热。大便难。谵语。
【脉】轻者脉滞缓。若重者。烦渴。谵语。大便闭。关脉实。
【治】若邪食上蒸。发热头痛。此伤食而兼有外邪。宜枳实栀豉汤。加生楂肉、麦芽、连翘、莱菔子等。
凉疏之。无火。舌润不渴者。调中汤。香砂枳术汤。皆可用。若发热燥渴谵语。大便闭。关脉实者。
用枳实栀子豉汤。（枳实、栀子、豆豉、石膏、鼠屎。）加大黄下之。如热不解。大便如常者。参附三白汤、
加减治之。心下痞满。加枳实、黄连、桔梗。有痰呕。加半夏、竹茹。米食不化。加神曲、麦芽。肉食不化。
加生楂肉。草果。
【炳章按】热病瘥后。饮酒而复热。盖酒味辛而大热。伤寒前热未已。而又饮酒。则转加热甚而增剧。
必兼烦闷干呕。口燥不纳等症。急用川连、葛花、连翘、生栀、枳实、乌梅、银花解之。林澜用小柴胡汤。加葛
根、黄连、乌梅。脉洪大者。人参白虎汤。加葛根、黄连。或竹叶石膏汤。加鸡距子、亦妙。《千金》方云。大病
瘥后食猪肉及羊血肥鱼油腻等。必大下利难治。食饼、饵、粢、黍、饴、 、HT 、馐、枣、栗、诸果。坚实难
消之物。胃气虚弱。不能消化。必更结热。不下必死。下之复危。皆难治也。瘥后食一切肉面者。病
更发。饮酒又食蒜韭菜者。病更发。食生鱼 下利不止。食生菜及瓜。令颜色终身不复。食生枣羊肉。膈
上作热蒸。食犬羊等肉。作骨蒸。新汗解后。饮冷水者。损心胞。令人虚。虽补不复。《金匮》云。
时病新瘥。食生菜者。手足必肿。此皆瘥后食物之禁也。
【病因】热病体温退去之后，胃气仍然虚弱，体内残余的病邪尚未清除。此时应先少量饮用清淡的米汤，接着饮用浓稠的米汤，再食用稀粥。也必须少量多次地给予，切勿随意过量饮食。如果进食谷物过于急促，脾胃运化功能不及，残余的病邪便会借助食滞而再次发作，这被称为“食复”。一般来说，体质强壮的人需要调养两个月，体质虚弱的人需要调养一百天，才能不再复发疾病。
【症状】出现发热、头痛、心烦闷乱且不想进食的症状。轻症表现为傍晚时分轻微烦躁，这是由于过早进食或进食过多所致。因胃气虚弱无法消化食物，应当减少饮食摄入即可痊愈。重症则表现为发热、大便困难、说胡话（谵语）。
【脉象】轻症者脉象涩滞而缓慢；若为重症，则见心烦口渴、说胡话、大便闭塞，关部脉象实大有力。
【治法】如果邪气与食积向上蒸腾，导致发热、头痛，这是伤食兼有外邪的情况，宜用枳实栀子豉汤，加入生山楂肉、麦芽、连翘、莱菔子等药物，以清凉疏解。若无火热之象，舌苔润泽且不口渴者，可用调中汤、香砂枳术汤，这些方剂均可使用。若见发热、燥渴、说胡话、大便闭塞、关脉实大者，使用枳实栀子豉汤（由枳实、栀子、豆豉、石膏、鼠屎组成），加大黄以攻下泄热。如果热势不退，但大便正常者，用参附三白汤加减治疗。若心下部痞塞胀满，加枳实、黄连、桔梗；若有痰饮呕吐，加半夏、竹茹；若米食不消化，加神曲、麦芽；若肉食不消化，加生山楂肉、草果。
【炳章按语】热病初愈后，饮酒导致再次发热。因为酒性辛散且大热，在伤寒前热未完全消退时又饮酒，会使热势加重并加剧病情，必然伴有烦闷、干呕、口燥、不能进食等症状。急需用川黄连、葛花、连翘、生栀子、枳实、乌梅、金银花来解酒毒。林澜用小柴胡汤，加入葛根、黄连、乌梅。脉象洪大者，用人参白虎汤，加入葛根、黄连。或者用竹叶石膏汤，加入鸡距子，效果也很好。《千金方》记载：大病初愈后食用猪肉、羊血、肥鱼及油腻之物，必然导致严重腹泻且难以治愈。食用饼、饵、粢、黍、饴糖、糕点、美味佳肴、枣、栗等各种果实，以及坚硬难消化的食物，因胃气虚弱无法消化，必然导致郁结化热，不下泻必死，强行下泻也会危及生命，都属于难治之症。病愈后食用一切肉类面食，疾病会再次发作；饮酒后又吃蒜和韭菜，疾病会再次发作；食用生鱼导致腹泻不止；食用生菜及瓜果，会导致面色终身无法恢复；食用生枣和羊肉，胸膈上部会产生热气蒸腾感；食用狗肉、羊肉等，会引起骨蒸劳热。新近汗出表解后，饮用冷水，会损伤心包络，使人虚损，即使进补也难以恢复。《金匮要略》说：时令病刚刚痊愈，食用生菜，手脚必然肿胀。这些都是病愈后的饮食禁忌。
[Pathogenesis] After the fever of a febrile disease subsides, the Stomach Qi remains deficient, and residual pathogenic factors have not yet been cleared. At this stage, one should first consume light rice water in small amounts, followed by thick rice water, and then thin porridge. These must be given in small quantities and frequently. One must absolutely avoid overeating at will. If grain intake is too rapid, the transportation and transformation functions cannot keep up, and residual pathogens may take advantage of food stagnation to recur. This is termed "food relapse" (Shi Fu). Generally, robust individuals require two months of recuperation, while weak individuals require one hundred days, before the disease ceases to recur.
[Symptoms] Manifestations include fever, headache, mental restlessness, irritability, and anorexia. In mild cases, there is slight irritability towards dusk, caused by eating too early or consuming too much food. Due to Stomach deficiency and inability to digest food, recovery can be achieved by reducing dietary intake. In severe cases, symptoms include fever, difficulty in defecation, and delirium.
[Pulse Diagnosis] In mild cases, the pulse is choppy and slow. In severe cases, there is irritability with thirst, delirium, constipation, and the Guan position pulse is excess and forceful.
[Treatment] If pathogenic factors and food stagnation steam upwards, causing fever and headache, this indicates food injury complicated by external pathogens. The appropriate formula is Zhishi Zhizi Chi Tang (Immature Bitter Orange, Gardenia, and Fermented Soybean Decoction), added with raw Hawthorn Fruit (Shanzha), Malt (Maiya), Forsythia (Lianqiao), and Radish Seed (Laifuzi), to cool and disperse. If there is no fire manifestation, with a moist tongue and no thirst, Tiaozhong Tang (Regulate the Middle Decoction) or Xiangsha Zhizhu Tang (Aucklandia and Amomum, Atractylodes and Immature Bitter Orange Decoction) can be used. If there is fever, dryness with thirst, delirium, constipation, and an excess Guan pulse, use Zhishi Zhizi Chi Tang (composed of Zhishi, Zhizi, Douchi, Shigao, and Mus Shi/Rat Feces) plus Dahuang to purge downwards. If the heat does not resolve but bowel movements are normal, use Shenfu Sanbai Tang (Ginseng and Aconite Three Whites Decoction) with modifications. For epigastric fullness and stuffiness, add Zhishi, Huanglian, and Jiegeng. For phlegm and vomiting, add Banxia and Zhuru. For undigested rice, add Shenqu and Maiya. For undigested meat, add raw Shanzha and Caoguo.
[Bingzhang's Commentary] Drinking alcohol after the recovery from a febrile disease causes recurrent fever. Alcohol is pungent and extremely hot. If alcohol is consumed while the pre-existing heat of Shaoyang syndrome has not yet resolved, it intensifies the heat and exacerbates the condition. Symptoms inevitably include irritability, dry retching, dry mouth, and anorexia. Urgently treat with Chuanlian (Coptis Rhizome), Gehua (Kadsura Flower), Lianqiao, raw Zhizi, Zhishi, Wumei, and Yinhua to resolve the toxicity. Lin Lan used Xiaochaihu Tang (Minor Bupleurum Decoction) added with Gegen, Huanglian, and Wumei. For a洪大 (Hongda/Great) pulse, use Renshen Baizhu Tang (Ginseng and White Tiger Decoction) added with Gegen and Huanglian. Alternatively, Zhuye Shigao Tang (Bamboo Leaf and Gypsum Decoction) added with Jijuzi is also effective. The *Qianjin Fang* states: After a major illness, consuming pork, sheep blood, fatty fish, and greasy foods will inevitably cause severe diarrhea that is difficult to treat. Consuming cakes, pastries, cereals, millet, maltose, sweets, delicacies, dates, chestnuts, and other fruits, as well as hard-to-digest solid foods, will cause heat accumulation due to Stomach deficiency and inability to digest. Failure to purge leads to death; purging leads to danger. All are difficult to treat. Eating all kinds of meat and noodles after recovery causes the disease to recur. Drinking alcohol and eating garlic and leeks causes the disease to recur. Eating raw fish causes incessant diarrhea. Eating raw vegetables and melons causes permanent deterioration of complexion. Eating raw dates and mutton causes steaming heat in the chest and diaphragm. Eating dog or mutton causes bone-steaming consumption. Drinking cold water immediately after sweating resolves the exterior, damages the Pericardium, causes deficiency, and even tonification cannot restore health. The *Jingui Yaolue* states: When seasonal diseases have just recovered, eating raw vegetables causes swelling of the hands and feet. These are all dietary prohibitions after recovery.