《大全》曰∶胃为水谷之海，水谷之精，以为血气，荣润脏腑。因产则脏腑伤动，有时而气独盛，气乘肠胃，
肠胃燥涩，其气则逆，故呕逆不下食。
郭稽中曰∶胃受水谷，脾主运化，生血生气，内濡脏腑。因产暴虚，恶露不下，败血乘虚，散于脾胃。脾
受之为腹胀，胃受之为呕吐。亦有恶露过多，气无所生，聚于脾胃。脾受之，亦为腹胀。胃受之，亦为吐逆也。
薛立斋曰∶产后呕吐，因饮食过多者，六君子加楂、曲。兼劳役者，补中汤。因饮食停滞者，人参养胃汤。
脾胃气虚者，六君子。胃气虚寒者，加炮姜、木香。寒水侮土者，益黄散。肝木侮土者，六君子加升、柴。命
门火衰，不能生土者，八味丸。呕吐泄泻，手足俱冷，或肚腹作痛，乃阳气虚寒，急用附子理中。
慎斋按∶以上三条，序产后有呕吐之证也。呕吐为中焦病，产后气血大亏，则中气不运，为饮食所伤，而
呕吐者多。若《大全》主于燥涩气逆，稽中主于恶露不下。此在新产三四朝内，庸有之，病机不可不审。
《大全》曰∶肺主气，五脏六腑俱禀于气。产后气血伤，脏腑皆损。风冷抟于气，则气逆上。又脾虚聚冷，
胃中伏寒，因食热物，冷热之气相为冲击，使气厥不顺，则为呃逆。脾主中焦，为三焦之关，五脏之仓廪，贮
积水谷。若阴阳气虚，使荣卫之气厥逆，致生斯病。经云∶呃噫者，胃寒所生，服药无效，灸期门穴三壮必愈。
《妇人大全良方》说：胃是容纳水谷的器官，水谷中的精微物质转化为血气，以滋养润泽脏腑。因为分娩导致脏腑受损动荡，有时会出现气机独盛的情况，气邪侵犯肠胃，致使肠胃干燥涩滞，气机上逆，所以出现呕吐、呃逆且无法进食的症状。
郭稽中说：胃接受水谷，脾主司运化，生成血和气，向内濡养脏腑。因分娩后身体突然虚弱，恶露排出不畅，败血乘虚而入，散乱于脾胃之间。脾受到败血影响则出现腹胀，胃受到败血影响则出现呕吐。也有因恶露排出过多，导致气无所依附而生，积聚在脾胃。脾受之，同样表现为腹胀；胃受之，同样表现为吐逆。
薛立斋说：产后呕吐，如果是由于饮食过量引起的，用六君子汤加山楂、神曲。如果兼有劳累过度引起的，用补中益气汤。如果是因饮食停滞引起的，用人参养胃汤。如果是脾胃气虚，用六君子汤。如果是胃气虚寒，加炮姜、木香。如果是寒水之气反侮脾土（肾阳不足寒水上泛），用益黄散。如果是肝木之气反侮脾土（肝气犯胃），用六君子汤加升麻、柴胡。如果是命门火衰，不能温煦脾土，用八味丸。如果出现呕吐泄泻、手足冰冷，或者肚腹疼痛，这是阳气虚寒的表现，急需使用附子理中汤。
慎斋按语：以上三条论述了产后出现呕吐证候的情况。呕吐属于中焦疾病，产后气血大量亏损，导致中气不运，容易因饮食损伤而发生呕吐，这种情况较多见。如果像《大全》所说的主因是燥涩气逆，郭稽中所说是主因是恶露不下。这些情况在新产后的三四天内偶尔会有发生，但病机不可不仔细审察。
《妇人大全良方》又说：肺主气，五脏六腑都禀受于气。产后气血受伤，脏腑均受损耗。风冷之气搏结于气分，导致气机上逆。另外，脾虚聚积冷邪，胃中有潜伏的寒气，此时如果进食热性食物，冷热之气相互冲击，导致气机厥逆不顺，从而产生呃逆。脾主中焦，是三焦的关口，也是五脏的仓库，储存水谷。如果阴阳之气虚弱，导致营卫之气厥逆，从而引发此病。医经说：呃逆嗳气，是由胃寒引起的，如果服药无效，灸期门穴三壮必定痊愈。
*Daquan* states: The Stomach is the sea of water and grain; the essence derived from water and grain transforms into blood and Qi, nourishing and moistening the Zang-Fu organs. Due to childbirth, the Zang-Fu organs are injured and disturbed. At times, Qi becomes excessively vigorous. When pathogenic Qi invades the intestines and stomach, causing them to become dry and obstructed, the Qi rebels upward, resulting in vomiting, hiccuping, and an inability to eat.
Guo Jizhong stated: The Stomach receives water and grain, while the Spleen governs transportation and transformation, generating blood and Qi to internally moisten the Zang-Fu organs. Following childbirth, the body becomes suddenly deficient. If lochia (postpartum discharge) does not flow smoothly, failed blood enters due to deficiency and scatters within the Spleen and Stomach. If the Spleen is affected by failed blood, abdominal distension occurs; if the Stomach is affected, vomiting occurs. Conversely, if lochia flows excessively, there is insufficient Qi generation, leading to accumulation in the Spleen and Stomach. If the Spleen is affected, it also results in abdominal distension; if the Stomach is affected, it results in vomiting and regurgitation.
Xue Lizhai stated: For postpartum vomiting caused by excessive food intake, use Liu Jun Zi Tang (Six Gentlemen Decoction) with Shan Zha (Hawthorn Fruit) and Qu (Medicated Leaven). If accompanied by fatigue and overexertion, use Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction). If caused by food stagnation, use Ren Shen Yang Wei Tang (Ginseng Decoction for Nourishing the Stomach). For Spleen and Stomach Qi deficiency, use Liu Jun Zi Tang (Six Gentlemen Decoction). For Stomach Qi deficiency and cold, add Pao Jiang (Prepared Ginger) and Mu Xiang (Aucklandia Root). If Cold Water insults Earth (Kidney Yang deficiency with cold water flooding), use Yi Huang San (Yellow Powder to Strengthen the Spleen). If Liver Wood insults Earth (Liver Qi invading the Stomach), use Liu Jun Zi Tang (Six Gentlemen Decoction) with Sheng Ma (Cimicifuga Rhizome) and Chai Hu (Bupleurum Root). If Ming Men Fire (Fire of the Gate of Life) is deficient and fails to generate Earth, use Ba Wei Wan (Eight-Ingredient Pill). If vomiting and diarrhea occur with cold hands and feet or abdominal pain, this indicates Yang Qi deficiency and cold; urgently use Fu Zi Li Zhong Tang (Aconite Decoction to Warm the Middle).
Shen Zhai commented: The above three passages describe the syndrome of vomiting after childbirth. Vomiting is a disease of the Middle Jiao. After childbirth, when Blood and Qi are severely depleted, the Central Qi fails to circulate, making one susceptible to injury by diet, thus vomiting is common. While *Daquan* attributes it to dryness, obstruction, and Qi rebellion, and Guo Jizhong attributes it to stagnant lochia, these conditions may occasionally occur within three to four days after delivery. However, the pathogenesis must be carefully examined.
*Daquan* further states: The Lungs govern Qi, and all Zang-Fu organs derive from Qi. After childbirth, Blood and Qi are injured, and all Zang-Fu organs are damaged. If Wind-Cold combines with Qi, causing Qi to rebel upward, symptoms arise. Additionally, if Spleen deficiency leads to the accumulation of Cold, and latent Cold resides in the Stomach, consuming hot food causes a clash between cold and hot energies. This disrupts the smooth flow of Qi, causing Qi to revolt and resulting in hiccups. The Spleen governs the Middle Jiao, serves as the gate of the Three Jiao, and acts as the granary of the Five Zang organs, storing water and grain. If Yin and Yang Qi are deficient, causing the Ying (Nutritive) and Wei (Defensive) Qi to revolt, this disease arises. The Classics state: Hiccups and belching are generated by Stomach Cold. If medication is ineffective, moxa should be applied to Qi Men (LR14) for three moxibustion cones, which will surely cure the condition.