In cases of malaria occurring postpartum, it is mostly caused by a deficiency of blood complicated by cold and heat pathogens. The general principle of treatment is to regulate with Chaihu Siwu Tang (Bupleurum and Four Substances Decoction). If heat predominates, Caoguo Yinzi (Tsaoko Fruit Drink) should be used; if cold predominates, Shengshu Yinzi (Raw and Cooked Drink) should be used. Xue Lizhai stated: Postpartum malaria is due to the weakness of the Spleen and Stomach, stagnation of food, or invasion of external pathogens. It may also result from anger damaging the Spleen or latent summer-heat pathogens. If confirmed to be due to food stagnation, Liujunzi Tang (Six Gentlemen Decoction) with Jiegeng (Platycodon Root), Cangzhu (Atractylodis Rhizoma), and Huoxiang (Patchouli Herb) is used. If external pathogens are heavy and food stagnation is light, Huoxiang Zhengqi San (Patchouli Powder for Rectifying the Qi) is used. If caused by improper diet and overwork, Buzhong Yiqi Tang (Decoction for Supplementing the Middle and Augmenting the Qi) is used. For Qi and Blood deficiency, Shiquan Dabu Tang (Comprehensive Great Tonifying Decoction) is used. For deficiency-cold, Liujunzi Tang with Jiang (Ginger) and Gui (Cinnamon Twig) is used. In cases of Yuanqi (Original Qi) collapse and sinking, Fuzi (Aconite Lateral Root) is urgently added. Generally, chronic malaria belongs to deficiency-cold of Yuanqi. Qi deficiency leads to cold, while Blood deficiency leads to heat. Stomach deficiency leads to aversion to cold; downward flow of Yin fire causes alternating chills and fever; symptoms may include vomiting, diarrhea, anorexia, abdominal pain, irritability, thirst, fever, delirium, or cold extremities. Although various symptoms may appear, vigorous warming and tonification should be employed, and the disease will recede spontaneously. If mistakenly treated with drugs that clear the Spleen and arrest malaria, the condition often becomes incurable, as damage to the Middle Qi leads to numerous complications.

Caoguo Yinzi (Tsaoko Fruit Drink)
Indicated for postpartum malaria with equal amounts of cold and heat, or when heat predominates.
Banxia (Pinellia Tuber), Chi Fuling (Red Poria), Gancao (Licorice Root, honey-fried), Caoguo (Tsaoko Fruit), Chuanxiong (Szechwan Lovage Rhizome), Chenpi (Citrus Reticulata Peel), Baizhi (Angelica Dahurica Root) (each 2 qian); Qingpi (Green Citrus Peel), Liangjiang (Galangal Rhizome), Zisu (Perilla Leaf) (each 2.5 qian); Ganjiang (Dried Ginger) (4 qian).
Grind into coarse powder, divide into four doses. For each dose, use one large bowl of water, three slices of fresh ginger, and three jujubes. Decoct until reduced to 70%. On the day of onset, take two doses consecutively to achieve cure.

Shengshu Yinzi (Raw and Cooked Drink)
Indicated for postpartum malaria where cold predominates.
Roudoukou (Nutmeg), Caoguoren (Tsaoko Fruit Seed), Houpo (Magnolia Bark, raw, coarse skin removed), Banxia (Pinellia Tuber, processed), Chenpi (Citrus Returulata Peel), Gancao (Licorice Root), Dazao (Jujube), Shengjiang (Fresh Ginger).
Take equal parts of these eight herbs. Finely cut half of the mixture, wrap in wet paper, and roast until fragrant and cooked. Remove the paper and mix evenly with the other half which remains raw. Take 5 qian per dose with one large bowl of water, decoct until reduced to 70%. Take one dose before meals and one dose after meals.

Note: For early-stage malaria, the above two methods should be used first. If ineffective, Xue's method should be adopted.