凡妇人产后，阴血虚，阳无所根据，而浮散于外，故多发热。治法用四物汤补阴血，而以炙干姜之苦温
从治，收其浮散，使归根据于阴。然产后脾胃虚，多有过于饮食伤滞而发热者，误作血虚则不效矣。但遇产
后发热，若胸膈饱闷，嗳气，恶食，泄泻等症，只作伤食治之。若发热而饮食自调者，方用补血正法。
愚按新产阴血暴伤，阳无所附而外热，宜用四物、炮姜补阴以配阳；若因误服寒凉克伐之剂而外
热，此为寒气隔阳于外，宜用四君子加姜、桂，如不应，急加附子；若或肌肤发热，面目赤色，烦渴引
饮，此血脱发躁，宜用当归补血汤，若胸膈饱闷，嗳腐恶食，或吞酸，吐泻，发热，此为饮食停滞，宜用
四君子加浓朴、山楂；若胸膈饱闷，食少，发热，或食而难化，此为脾气虚弱，宜用六君子加炮姜；若用
峻厉之剂，腹痛，热渴，寒热，呕吐等症，此为中气复伤，急用六君子加炮姜，若认为热，投以他剂则误矣。
凡伤寒时气大病热退之后，先服参、 甘温之药一二服，以扶元气，随后便服滋阴生津润燥之药。盖
大病后汗液外耗，水谷内竭，必有小便赤涩，大便秘结等症，须识此意预防之。
愚按大病后，谷消水去，精散卫亡，多致便利枯竭，宜当补中益气为要。盖脾为中州，浇灌四傍，为
胃行其津液者也。况大肠主津，小肠主液，亦皆禀气于胃，胃气一充，津液自行矣。燥甚者，别当以辛
润之，以苦泄之。
凡是妇女产后，阴血亏虚，阳气失去依附的基础，从而浮散于体表，所以大多会出现发热的症状。治疗法则应当使用四物汤（由当归、川芎、白芍、熟地黄组成，具有补血调经功效的方剂）来补益阴血，并配合使用炙干姜（经过蜜炙或炒制的干姜，性味苦温），以顺从病势而治，收敛浮散的阳气，使其重新回归并依附于阴血之中。然而，产妇脾胃虚弱，常常因为饮食过量导致食物停滞损伤而出现发热，如果错误地将其当作血虚来处理，就不会见效。因此，遇到产后发热，如果出现胸膈部饱闷胀满、嗳气、厌恶进食、腹泻等症状，只按照伤食（饮食停滞）来治疗即可。如果发热但饮食消化正常，才使用补血的正法治疗。
我按语：新近生产后，阴血突然大量耗伤，阳气没有依附之处而导致体表发热，适宜使用四物汤配合炮姜（煨制过的干姜），通过补益阴血来配合同化阳气；如果是由于误服寒凉攻伐的药物而导致体表发热，这是因为寒气阻隔了阳气于体表之外，适宜使用四君子汤（由人参、白术、茯苓、甘草组成，具有益气健脾功效的方剂）加入生姜和肉桂，如果无效，紧急情况下加入附子（毛茛科植物乌头的子根加工品，具有回阳救逆功效）；如果肌肤发热，面目发红，心烦口渴想要饮水，这是失血后导致的烦躁不安，适宜使用当归补血汤（由黄芪、当归组成，具有补气生血功效的方剂）；如果胸膈部饱闷胀满，嗳出腐臭气味，厌恶进食，或者吞酸水，呕吐腹泻，发热，这是饮食停滞所致，适宜使用四君子汤加入厚朴（厚朴树皮，具有行气消积功效）和山楂（山楂果实，具有消食化积功效）；如果胸膈部饱闷胀满，食欲减少，发热，或者吃了东西难以消化，这是脾气虚弱所致，适宜使用六君子汤（四君子汤加陈皮、半夏，具有益气健脾、燥湿化痰功效的方剂）加入炮姜；如果使用过于峻猛严厉的药物治疗，出现腹痛、热渴、寒热往来、呕吐等症状，这是中气再次受到损伤，紧急情况下使用六君子汤加入炮姜，如果误认为是热证，投用其他清热药剂就会造成错误。
凡是伤寒或时气（指具有传染性的外感热病）大病热退之后，先服用参类（如人参）和甘温性质的药物一二服，以扶持元气，随后再服用滋阴生津、润燥的药物。因为大病之后，汗液向外耗损，水谷精微在内枯竭，必然会出现小便赤红涩痛、大便秘结等症状，必须明白这个道理加以预防。
我按语：大病之后，谷物消化殆尽，水液流失，精气涣散，卫气亡失，多导致二便干枯枯竭，应当以补中益气（补益中焦脾胃之气）为主要治疗原则。因为脾脏位于中焦，如同中央枢纽，灌溉滋养四周脏腑，是帮助胃传输津液的器官。况且大肠主管津液，小肠主管液体，也都禀受于胃气，胃气一旦充盈，津液自然就能生成运行。干燥严重的，另外应当用辛味滋润的方法，用苦味泄下的方法处理。
For women after childbirth, Yin blood is deficient, and Yang Qi has no foundation to rely on, causing it to float and scatter outward; therefore, fever often occurs. The treatment principle is to use Siwu Tang (Four Substances Decoction) to tonify Yin blood, and combine it with Zhi Ganjiang (Honey-fried Dried Ginger), which is bitter and warm, to treat in accordance with the disease's manifestation, consolidating the floating Yang Qi so that it returns to rely on Yin. However, postpartum Spleen and Stomach are weak, and many cases of fever arise from overeating leading to food stagnation; mistaking this for blood deficiency will result in ineffectiveness. Thus, when encountering postpartum fever, if symptoms such as chest and diaphragm fullness and oppression, belching, aversion to food, and diarrhea are present, treat it solely as food stagnation. If there is fever but digestion and appetite remain normal, then apply the standard method of tonifying blood.
My commentary: After recent childbirth, Yin blood is suddenly and severely injured, leaving Yang Qi without attachment, resulting in external heat. It is appropriate to use Siwu Tang combined with Pao Jiang (Baked Dried Ginger) to tonify Yin to harmonize with Yang. If external heat results from the mistaken administration of cold and purgative medicines, this indicates that Cold pathogen is isolating Yang Qi externally; it is appropriate to use Sijunzi Tang (Four Gentlemen Decoction) added with Sheng Jiang (Fresh Ginger) and Rougui (Cinnamon Bark). If ineffective, add Fuzi (Prepared Aconite Root) urgently. If skin feels hot, face and eyes appear red, accompanied by irritability, thirst, and desire to drink, this is restlessness due to blood loss and hair shedding; Danggui Buxue Tang (Danggui Tonifies Blood Decoction) should be used. If chest and diaphragm fullness, belching of rotten smells, aversion to food, acid regurgitation, vomiting, diarrhea, and fever occur, this is caused by food stagnation; Sijunzi Tang added with Houpo (Magnolia Bark) and Shanzha (Hawthorn Fruit) should be used. If chest and diaphragm fullness, reduced appetite, fever, or difficulty digesting food occur, this is due to Spleen Qi deficiency; Liujunzi Tang (Six Gentlemen Decoction) added with Pao Jiang should be used. If harsh and severe medicines are used, leading to abdominal pain, thirst with heat, alternating chills and fever, and vomiting, this indicates further injury to Middle Qi; urgently use Liujunzi Tang added with Pao Jiang. Mistaking this for a Heat syndrome and administering other cooling agents would be an error.
After the fever subsides following severe diseases such as Shanghan (Cold Damage) or Shiqi (Seasonal Epidemic Diseases), first administer one or two doses of Ginseng and sweet-warm herbs to support Yuan Qi (Original Qi), followed by Yin-nourishing, fluid-generating, and dryness-moistening herbs. This is because after severe illness, sweat is externally depleted, and water and grain essences are internally exhausted, inevitably leading to symptoms such as dark and scanty urination and constipation; one must understand this to prevent complications.
My commentary: After severe illness, grain is consumed, fluids are lost, essence scatters, and Wei Qi (Defensive Qi) perishes, often leading to dryness and depletion of bowel movements and urination. The key treatment should be Bu Zhong Yi Qi (Tonifying the Middle and Augmenting Qi). The Spleen resides in the Middle Jiao, acting as a hub to irrigate the four directions, and assists the Stomach in transporting and transforming Jin-Ye (Body Fluids). Moreover, the Large Intestine governs Jin (Thin Fluids), and the Small Intestine governs Ye (Turbid Fluids); both derive their Qi from the Stomach. Once Stomach Qi is replenished, body fluids will naturally generate and circulate. In cases of severe dryness, alternative methods using acrid-to-moisten and bitter-to-drain approaches should be employed.