疟疾皆由冒感风寒暑热而发，丹溪有曰∶若无汗要有汗以散邪为主，若有汗要止汗以扶
正气为先。此千古不磨至之论也。发时有一寒一热，身重骨节疼痛，自汗多呕者，湿疟也。由
汗出脱衣冲冒风寒，或渴极过饮冷水，或冷水浴身所致。有食疟者食所伤，由饮食过度伤寒
所致。俱用柴胡、前胡、青皮、陈皮、苍术、白术、白茯、甘草、猪苓、泽泻、知母、贝母
、浓朴、半夏、黄柏等分，姜枣引，服一剂以清之。于发疟日之五鼓，空心以前方加常山、
槟榔、草果仁等分煎服以截之，即愈。如久疟不止致中气弱极，名曰脾寒，用四兽饮加枣
、姜，服五六剂自愈。
夏禹铸曰∶有阴虚似疟竟作疟治者，这般人却没有一毫心思一线想头。夫谓之曰∶似则
两症相去。原是星渊即曰∶似疟亦只似其疟之脾寒。试问∶普天下人可有疟一起而就成脾寒
者。是必始于清之无法，继又截之无方，或从不服药，相延日久，才到脾寒之症。明明有这
一条来路，若一见每日下午身有潮热，冷状飕，便作疟治，独不思到疟有来路。况脾疟由
重减轻，阴虚由轻加重，两症判然，竟不知别。此一种心窍，真不可理解。
阴虚似疟，如潮热稍重于作寒，治用四物汤加人参。如心、肺、肝有热，虽汤内已有熟
地，再外加生地。如作寒稍重于潮热，四物汤外加黄 、人参、甘草等分参减半。如潮热作寒
俱轻，只用四物汤，不须外加。如女患此，加红花二三分。
疟疾都是由感受风寒暑热邪气而引发的。朱丹溪曾说：“如果没有汗，治疗应以发汗散邪为主；如果有汗，治疗应以止汗扶正为先。”这是千古不变的正确论断。发作时出现一阵寒冷、一阵发热，身体沉重，骨节疼痛，自汗且多呕吐的，属于湿疟。这是由于出汗后脱衣受凉，或者口渴至极过量饮用冷水，或用冷水洗澡所导致的。有食疟，是由饮食损伤引起的，因饮食过度并受寒所致。这些情况都使用柴胡、前胡、青皮、陈皮、苍术、白术、白茯苓、甘草、猪苓、泽泻、知母、贝母、厚朴、半夏、黄柏等量，以生姜和大枣为引，服用一剂以清除病邪。在疟疾发作当天的五更时分，空腹以前方加入常山、槟榔、草果仁等量煎服以截断疟疾，即可痊愈。如果久疟不止导致中气极度虚弱，称为脾寒，使用四兽饮加红枣、生姜，服用五六剂即可自愈。
夏禹铸说：有阴虚症状类似疟疾却被当作疟疾治疗的，这种人简直是一点心思都没有，毫无见解。所谓“似”，说明两种病症是有区别的。原本说是“星渊”（此处疑为笔误或特定语境指代，意指相似但有区别），即使说像疟疾，也只是像疟疾中的脾寒证。试问：普天下的人可有疟疾一起病就形成脾寒证的？这一定是开始清热没有方法，接着截疟没有方药，或者一直不服药，拖延日久，才发展到脾寒的症状。明明有这一条演变过程，如果一见每天下午身体有潮热，怕冷发抖，就当作疟疾治疗，难道不想想疟疾是有其发病过程的吗？况且脾疟是由重变轻，阴虚是由轻变重，两种病症截然不同，竟然不知道辨别。这种思维逻辑，真是不可理解。
阴虚似疟的治疗，如果潮热比恶寒稍重，治疗使用四物汤加人参。如果心、肺、肝有热，虽然汤内已有熟地黄，再额外加上生地黄。如果恶寒比潮热稍重，四物汤外加黄芪、人参、甘草等量，其中人参减半。如果潮热和恶寒都较轻，只用四物汤，不需要额外添加药物。如果是女性患此病，加红花二三分。
Malaria is all caused by contracting wind-cold, summer-heat, or heat pathogens. Zhu Danxi once said: "If there is no sweating, treatment should focus on inducing sweating to disperse the pathogen; if there is sweating, treatment should focus on stopping sweating to support healthy qi first." This is an unchangeable truth for millennia. When attacking, presenting with alternating chills and fever, heavy body, pain in bone joints, spontaneous sweating, and frequent vomiting, it is damp malaria (Shi Nue). It is caused by exposing oneself to wind-cold after sweating, drinking excessive cold water due to extreme thirst, or bathing in cold water. There is food malaria (Shi Nue), caused by dietary injury, resulting from overeating combined with cold contraction. For these conditions, use equal parts of Chai Hu (Bupleuri Radix), Qian Hu (Peucedani Radix), Qing Pi (Aurantii Fructus Immaturus), Chen Pi (Aurantii Pericarpium), Cang Zhu (Atractylodis Rhizoma), Bai Zhu (Atractylodis Macrocephalae Rhizoma), Bai Fu Ling (Poria), Gan Cao (Glycyrrhizae Radix et Rhizoma), Zhu Ling (Polyporus), Ze Xie (Alismatis Rhizoma), Zhi Mu (Anemarrhenae Rhizoma), Bei Mu (Fritillariae Cirrhosae Bulbus), Hou Po (Magnoliae Officinalis Cortex), Ban Xia (Pinelliae Rhizoma), and Huang Bo (Phellodendri Cortex), with Sheng Jiang (Zingiberis Rhizoma Recens) and Da Zao (Jujubae Fructus) as guides. Take one dose to clear the pathogen. On the day of the malaria attack, at wu geng (5-7 AM), before breakfast, decoct the above formula with added Chang Shan (Dichroae Radix), Bing Lang (Arecae Semen), and Cao Guo Ren (Tsaoko Fructus) in equal parts to intercept the malaria, which will lead to recovery. If chronic malaria persists causing extreme weakness of middle qi, it is called spleen cold (Pi Han). Use Si Shou Yin (Four Beast Decoction) with added Jujube and Ginger, taking five to six doses for self-healing.
Xia Yuzhu said: There are cases where yin deficiency mimics malaria but is treated as malaria. Such people have absolutely no insight or understanding. The term "mimics" implies that the two syndromes are distinct. Even if one says it resembles malaria, it only resembles the spleen cold pattern within malaria. Ask yourself: Is there anyone in the world whose malaria immediately presents as spleen cold upon onset? This condition must arise from ineffective clearing methods initially, followed by unsuccessful interception methods, or from refusing medication altogether, dragging on for a long time until reaching the stage of spleen cold. Clearly, there is this progression. If one sees afternoon tidal fever and shivering chills and treats it as malaria, does one not consider that malaria has its own developmental course? Moreover, spleen malaria improves from severe to mild, whereas yin deficiency worsens from mild to severe. The two syndromes are clearly different, yet they are not distinguished. This kind of cognitive flaw is truly incomprehensible.
For yin deficiency mimicking malaria: If tidal fever is slightly more prominent than chills, treat with Si Wu Tang (Four Substance Decoction) plus Ren Shen (Ginseng Radix et Rhizoma). If there is heat in the Heart, Lung, or Liver, although Shu Di Huang (Rehmanniae Radix Praeparata) is already in the decoction, add Sheng Di Huang (Rehmanniae Radix) additionally. If chills are slightly more prominent than tidal fever, add Huang Qi (Astragali Radix), Ren Shen, and Gan Cao in equal parts to Si Wu Tang, with the dosage of Ren Shen halved. If both tidal fever and chills are mild, use only Si Wu Tang without additional herbs. If the patient is female, add Hong Hua (Carthami Flos) two to three fen.