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Postpartum indigestion with undigested food in stool (Wangu Buhua) occurs due to spleen injury caused by labor fatigue, resulting in delayed transportation and transformation. When water and grain enter the stomach, they must be processed by the Spleen to disperse to the Lung, thereby regulating the water passages, so that Qi can be distributed to the five Zang organs to nourish the body. Now, due to postpartum fatigue injuring the Spleen, the function of transportation is lost, causing the harmonious Qi to fail in transformation, leading to cold substances being excreted intact. This condition is named Sun Xie (diarrhea with undigested food). Additionally, excessive diet damaging the Spleen and Stomach can also lead to indigestion with undigested food, commonly known as Shuigu Li (water-grain dysentery). However, within three days postpartum, when blood stasis has not yet dissipated, if this syndrome of Spleen failure and Stomach weakness occurs, one should not abruptly add Atractylodis Rhizoma (Baizhu) or Atractylodis Macrocephalae Rhizoma (Canshu). It is appropriate to administer Shenghua Tang (Life-Restoring Decoction) added with Alpiniae Oxyphyllae Fructus (Yizhi) and Amomi Fructus Rotundus (Xiangsha) to slightly warm the Stomach Qi. Wait until the blood stasis dissipates before adding Ginseng Radix (Renshen), Atractylodis Rhizoma (Baizhu), and Atractylodis Macrocephalae Rhizoma (Canshu) to tonify Qi; Mu Dou Kou (Nutmeg), Aucklandiae Radix (Muxiang), Amomi Fructus Rotundus (Sharen), and Alpiniae Oxyphyllae Fructus (Yizhi) to warm the Stomach; Bupleuri Radix (Chaihu) and Cimicifugae Rhizoma (Shengma) to guide clear Yang from the Stomach upward; and Alismatis Rhizoma (Zexie), Citri Reticulatae Pericarpium (Chenpi), and Poria (Fuling) to promote diuresis. This is the superior strategy.

Jiawei Shenghua Tang (Modified Life-Restoring Decoction): Treats postpartum indigestion with undigested food within three days, used for patients who were constitutionally weak before delivery and suffer from this syndrome.
Chuanxiong Rhizome (Chuanxiong) (1 qian)
Angelica Sinensis Root (Danggui) (4 qian)
Prepared Ginger (Paojiang) (4 fen)
Peach Seed (Taoren) (10 grains)
Alpiniae Oxyphyllae Fructus (Yizhi) (2 qian)
Poria (Fuling) (1.5 qian)

Shenling Shenghua Tang (Ginseng-Poria Life-Restoring Decoction): To be taken after postpartum blood stasis has dissipated, as a tonic formula.
Chuanxiong Rhizome (Chuanxiong) (2 qian)
Angelica Sinensis Root (Danggui) (2 qian)
Prepared Ginger (Paojiang) (4 fen)
Prepared Licorice Root (Zhigancao) (5 fen)
White Peony Root (Baishao) (1 qian)
Alpiniae Oxyphyllae Fructus (Yizhi) (1 qian, stir-fried)
Poria (Fuling) (1 qian)
Ginseng Radix (Renshen) (2 qian)
Atractylodis Rhizoma (Baizhu) (2 qian)
Lotus Seed (Lianzi) (8 seeds)
Nutmeg (Rougu) (1 piece, processed)

If there is a need to drain water, add Alismatis Rhizoma (Zexie) 8 fen and Akebia Stem (Mutong) 8 fen.

Modifications: For abdominal pain, add Amomi Fructus Rotundus (Sharen) 8 fen. For thirst, add Ophiopogonis Radix (Maidong) 2 qian and Schisandrae Fructus (Wuweizi) 10 grains. For watery diarrhea with cold signs, add Dried Ginger (Ganjiang) 1 qian and Aucklandiae Radix (Muxiang) 4 fen. For food stagnation presenting with yellow complexion, add Medicated Leaven (Shenqu) 2 qian and Hordeum Vulgare Sprout (Maiya) 2 qian to digest wheat-based foods; add Amomi Fructus Rotundus (Sharen) 2 qian and Crataegi Fructus (Shanzha) 5 grains to digest meat-based foods. If diarrhea and dysentery persist for a long time, with weak Stomach Qi and indigestion with undigested food, it is advisable to warm and assist Stomach Qi using Liujunzi Tang (Six Gentlemen Decoction) added with Aucklandiae Radix (Muxiang) 5 fen and processed Nutmeg (Zhi Rougu) 1 piece.