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Jiezai stated that postpartum spleen and stomach functions are severely deficient. There are often cases of fever caused by excessive food intake leading to food stagnation. If mistakenly treated as blood deficiency, the treatment will be ineffective. Therefore, when encountering postpartum fever, one must inquire about dietary habits, checking for signs such as food accumulation, fullness, distension, anorexia, or diarrhea, and treat it solely as food stagnation. Only if the fever subsides with dietary regulation should the standard method of tonifying blood be employed. However, Jiezai's discussion only mentions inquiry (inspection) but omits pulse diagnosis, and only addresses the excess symptoms of food stagnation as a branch manifestation, without discussing the underlying deficiency of qi and blood in the postpartum state. Therefore, Lizhai stated: Regarding the aforementioned conditions, if there is fullness and oppression in the chest and diaphragm, belching with a putrid odor, aversion to food, acid regurgitation, vomiting, diarrhea accompanied by fever, this indicates food stagnation. It is appropriate to use Sijunzi Tang (Four Gentlemen Decoction) augmented with Houpo (Magnolia Bark), Shanzha (Hawthorn Fruit), and Shenqu (Medicated Leaven). If there is chest and diaphragmatic oppression, reduced appetite with fever, or difficulty digesting food, this indicates spleen qi deficiency. It is appropriate to use Sijunzi Tang (Four Gentlemen Decoction) augmented with Paojiang (Prepared Ginger). Using harsh and drastic agents would further damage the primordial qi, which would be an error.

Postpartum hemorrhage accompanied by profuse sweating leads to dual deficiency of yin and yang. This is an extremely critical condition. The *Classic of Internal Medicine* (*Huangdi Neijing*) states: "Yang qi, when refined, nourishes the spirit; when soft and firm, it nourishes the sinews." Since postpartum women have already lost blood and now suffer from profuse sweating, this constitutes loss of yang. Sweat originates from blood and belongs to yin; when yin is depleted, yang follows and dissipates. Thus, it is termed loss of yang, and its medication differs from other conditions. For mild cases, Renshen (Ginseng Root), [text missing, likely Huangqi], Baizhu (Atractylodes Macrocephala Rhizome), Mahuanggen (Ephedra Root), Fangfeng (Saposhnikovia Root), and Guizhi (Cinnamon Twig) are used. For severe cases, Renshen (Ginseng Root) and Fuzi (Aconite Lateralis Radix Preparata) are used.

The *Jin Gui Yao Lue* (Essential Prescriptions of the Golden Cabinet) states: "In postpartum women suffering from Yu Mao (depression and dizziness), the pulse is faint, and only the head sweats. The reason is that blood deficiency leads to jue (reversal/cold extremities), and jue inevitably leads to mao (dizziness/obscuration). For the condition of mao to resolve, there must be profuse sweating over the whole body. Due to blood deficiency causing lower jue, isolated yang floats upward, hence the head sweat. Therefore, postpartum women welcome sweating because the loss of yin blood leads to blood deficiency and solitary excess of yang; thus, sweating allows yin and yang to restore balance. However, in postpartum Yu Mao, deficiency is predominant while pathogenic factors are few, so the pulse is faint, indicating deficiency of middle qi. The yin and yang of the entire body are disharmonious, hence no body sweat, only head sweat. Why? Blood deficiency causes lower jue, depleting the yin qi below, leaving yang as isolated yang floating upward, resulting in head sweat. Why is it still welcomed that resolution occurs through sweating? Because postpartum women lose excessive blood and deplete yin; compared to yin, yang is solitary and excessive. Therefore, they welcome sweating to reduce yang and align with yin, achieving yin-yang equilibrium, hence it is said that 'yin and yang are restored.'"