产后月水不通者，不必药也。妇人冲任之脉，为经络之海，皆起胞内，手太阳手太阴二经，上为乳
汁，下为月水。若产后去血过多，乳汁常有不通，若乳子半岁、一岁之内，月经不行，此尤常候。若半岁
左右便行，是必少壮血盛之人也。若产后一二年月经不通，无他疾苦，亦不必服通经之药，盖此或劳伤
荣卫，冲任脉虚，气血衰少耳。但服健脾胃及滋补气血之药，自然通行。若强通之，是犹揠苗者也。
产妇冲任血旺，脾胃气壮，饮食调匀，则乳足而浓，以生化之源旺也。若脾胃气
弱，饮食少进，冲任素亏，则乳少而薄，所乳之子，亦怯弱而多病，其乳以浓白光彩，
入盏中上而莹然如玉为上，黄色清薄为下，不可哺儿。乳母宜择肥瘦适中，无病经调，
善食者佳。太肥则多痰，太瘦则多火，儿饮其乳，亦复如是。如一儿昏睡，竟日不醒，
举家惊惶，求医投药罔效，一高医诊之曰∶此儿中酒，得毋乳母曾痛饮乎？询之果然，
停药而醒，可见其利害相关明矣。然时珍
曰∶人乳无定性，随饮食性气而变，故饮食调摄，乳母不可不慎也。若乳汁不行有二，
有气血盛而壅闭不行，有气血虚而燥涩不行，虚者补之，如十全八珍之类是也。盛者
疏之，如麦冬、栝蒌仁、天花粉、人参、葵子、猪胰、木通、漏芦、猪蹄之类，煮食是
也。其有乳汁自出者。若胃气虚而不能敛摄津液者，宜补胃气以敛之。若气血大虚，气
不卫外，血不荣里，而为妄泄者，宜调补荣卫以止之。若未产而乳自出，谓之乳泣，生
子多不育。若产妇劳役，乳汁涌下，此阳气虚而厥也，独参汤主之。
产后月经不通，不必用药治疗。妇女的冲脉和任脉，是经络之海，都起于胞宫内部。手太阳经和手太阴经，上行化为乳汁，下行化为月经。如果产后失血过多，乳汁常常不通畅；如果在哺乳半年到一年之内，月经不来潮，这更是常见的现象。如果断奶左右（约半岁）月经就来潮，那一定是身体强壮、血液充盈的人。如果产后一两年月经仍不通，但没有其他病痛，也不必服用通经的药物，因为这可能是劳损伤及营卫之气，导致冲任脉虚弱，气血衰少所致。只需服用健脾胃以及滋补气血的药物，月经自然会通畅。如果强行通经，这就好比拔苗助长一样。
产妇若冲任二脉血液旺盛，脾胃之气壮实，饮食调和均匀，那么乳汁就会充足且浓稠，这是因为生化之源旺盛的缘故。如果脾胃气弱，进食减少，冲任素来亏虚，那么乳汁就会稀少且稀薄，所哺育的孩子也会怯弱多病。判断乳汁优劣的标准是：乳汁以浓白有光彩，倒入盏中清澈如玉为上乘；黄色清稀淡薄为下品，不可喂养婴儿。乳母宜选择肥瘦适中、无疾病、月经调顺、善于进食者为佳。过于肥胖则多痰湿，过于消瘦则多内火，婴儿饮用其乳汁，也会出现相应的状况。例如有一个婴儿昏睡，整天不醒，全家惊慌失措，求医服药无效。一位高明医生诊断说：“这个孩子中了酒毒，莫非乳母曾经痛饮过？”询问后果然如此，停药后婴儿苏醒，可见利害关联非常明显了。然而李时珍说：“人乳没有固定的性质，会随着饮食的性质而改变，所以饮食调理摄养，乳母不可不谨慎。”
至于乳汁不行（不下），有两种情况：一种是气血盛实而壅滞闭阻导致不行，另一种是气血虚弱而干燥涩滞导致不行。虚证用补法，如十全大补汤、八珍汤之类；实证用疏利法，如麦冬、栝蒌仁、天花粉、人参、冬葵子、猪胰、木通、漏芦、猪蹄等，煮食即可。
如果有乳汁自行流出的情况：如果是胃气虚弱不能收敛津液导致的，宜补益胃气以收敛之。如果是气血大虚，气不能固护体表，血不能荣养体内，导致妄自泄出的，宜调和补益营卫之气以止住它。如果在未生产前乳汁就自行流出，称为“乳泣”，生下的孩子大多难以养活。如果产妇因过度劳累，乳汁涌出，这是阳气虚弱导致的厥逆证，用独参汤主治。
Postpartum amenorrhea (absence of menstruation after childbirth) does not necessarily require medication. The Chong Mai (Penetrating Vessel) and Ren Mai (Conception Vessel) in women are the seas of the meridians, originating from within the Bao Gong (Uterus). The Hand-Taiyang and Hand-Taiyin meridians transform upwards into Ru Zhi (Breast Milk) and downwards into Yue Shui (Menstrual Blood). If excessive blood loss occurs postpartum, breast milk may often be obstructed; if menstruation does not occur within six months to one year of nursing, this is a common physiological state. If menstruation resumes around the time of weaning (approximately six months), it indicates a person who is young, vigorous, and has abundant blood. If menstruation remains absent for one to two years postpartum without other discomforts, there is no need to take medications to promote menstruation, as this may result from labor injury damaging Ying Wei (Nutritive and Defensive Qi), leading to deficiency of the Chong and Ren vessels and depletion of Qi and Blood. Simply taking herbs that strengthen the Spleen and Stomach and tonify Qi and Blood will naturally restore flow. Forcing menstruation would be akin to pulling up seedlings to help them grow.
If a postpartum woman has abundant blood in the Chong and Ren vessels, strong Qi in the Spleen and Stomach, and regular diet, her breast milk will be sufficient and thick because the source of biological transformation is robust. If Spleen and Stomach Qi is weak, food intake is low, and the Chong and Ren vessels are inherently deficient, the breast milk will be scanty and thin, causing the nursed infant to be frail and prone to illness. High-quality breast milk is characterized by being thick, white, lustrous, and clear like jade when poured into a cup; yellow, clear, and thin breast milk is inferior and should not be fed to infants. A lactating mother should ideally be chosen for having a moderate body build, absence of disease, regulated menstruation, and good appetite. Being too fat leads to excessive Phlegm-Dampness, while being too thin leads to internal Fire; if an infant drinks such milk, similar conditions may arise. For instance, an infant fell into a deep sleep and did not wake all day, causing family panic. Medical treatment was ineffective until a skilled physician diagnosed: "This child has alcohol intoxication; did the lactating mother drink heavily?" Upon inquiry, this was confirmed. The infant woke after stopping the medication, clearly demonstrating the significant impact of maternal habits on the infant. However, Li Shizhen stated: "Human breast milk has no fixed nature; it changes according to the properties of food and drink. Therefore, dietary regulation is crucial for lactating mothers."
Regarding the failure of breast milk secretion, there are two types: one is obstruction due to excess Qi and Blood stagnation, and the other is dryness and涩滞 (stagnation) due to Qi and Blood deficiency. Deficiency cases are treated with tonification, such as using Shi Quan Da Bu Tang (Ten Significant Great Tonifying Decoction) or Ba Zhen Tang (Eight Treasures Decoction). Excess cases are treated with dispersing methods, such as consuming Mai Dong (Ophiopogonis Radix), Gua Lou Ren (Trichosanthis Semen), Tian Hua Fen (Trichosanthis Radix), Ren Shen (Ginseng Radix), Kui Zi (Abelmoschi Semen), Zhu Yi (Porcine Pancreas), Mu Tong (Akebiae Caulis), Lou Lu (Cimicifugae Rhizoma), and Zhu Ti (Porcine Trotters) cooked as food.
For spontaneous leakage of breast milk: If caused by weak Stomach Qi failing to consolidate fluids, tonify Stomach Qi to consolidate. If caused by severe Qi and Blood deficiency, where Qi fails to protect the exterior and Blood fails to nourish the interior, leading to reckless discharge, harmonize and tonify Ying and Wei Qi to stop it. If breast milk leaks before delivery, it is called Ru Qi (Weeping Breast); children born under this condition often fail to survive. If a postpartum woman experiences gushing breast milk due to overexertion, this is a Jue syndrome (reversal condition) due to Yang Qi deficiency, treated with Du Shen Tang (Single Ginseng Decoction).