凡妊娠当风取凉，则胞络有冷，至于产时，其血下必少。或新产而取风凉，皆令风冷搏
于血，致使血不宣消，蓄积在内，则有时血露淋沥下不尽。
妊娠取风冷过度，胞络有冷，比产血下则少。或新产血露未尽，而取风凉，皆令风冷搏
于血，血则壅滞不宣消，蓄积在内，内有冷气，共相搏击，故令痛也，甚者则变成血瘕，亦
令月水不通也。
产后气虚挟宿寒，寒搏于血，血则凝结不消，气逆上者，则血随上抢，冲击而心痛也。
凡产，余血不尽，得冷则结，与气相搏相痛。因重遇于寒，血结弥甚，变成血瘕，亦令月水
痞涩不通。
半产，谓妊娠儿骨节腑脏渐具，而日月未足便产也。多因劳役惊动所致，或触犯禁忌，
亦然也。
新产后，有血气相击而痛者，谓之瘕痛。瘕之言假也，谓其痛浮假无定处也。此由宿有
风冷，血气不治，至产血下少，故致此病也。不急治，多成积结，妨害月水，轻则痞涩，重
则不通。
夫产伤血劳气，腠理则虚，为风邪所乘。邪搏于气，不得宣泄，故令虚肿。轻浮如吹者
，是邪搏于气，气肿也；若皮薄如熟李状，则变为水肿也。气肿，发汗即愈；水肿，利小便
即瘥。
Whenever wind and cold are sought for cooling during pregnancy, the uterine collaterals (blood vessels connecting to the uterus) become cold. Upon delivery, the amount of blood discharged will necessarily be scant. Or, if one seeks wind and cold after childbirth, all these cause wind-cold to contend with the blood, resulting in the blood's failure to circulate and dissipate normally. Accumulated within, this leads to postpartum lochia dripping continuously without clearing.
Excessive exposure to wind and cold during pregnancy causes coldness in the uterine collaterals; near delivery, the blood discharge is scant. Or, if lochia has not fully cleared after childbirth and one seeks wind and cold, wind-cold contends with the blood. The blood becomes stagnant and fails to circulate and dissipate, accumulating inside. With cold qi inside contending with the stasis, pain ensues. Severe cases may transform into a blood mass (fixed abdominal lump), also causing amenorrhea.
Postpartum qi deficiency combined with pre-existing cold causes the cold to contend with the blood, leading to blood coagulation and failure to dissipate. If qi rebels upward, blood follows it up to rush against the heart, causing chest pain. Generally, after childbirth, residual blood that remains un-discharged congeals upon encountering cold, contending with qi to cause pain. If exposed to cold again, the blood congealment becomes more severe, transforming into a blood mass, and also causing menstrual obstruction and stagnation.
"Half-birth" refers to the situation where the fetus's bones, joints, and viscera have gradually developed, but birth occurs before the full term. This is mostly caused by overwork or fright/disturbance, or by violating taboos.
After recent childbirth, pain caused by the contention between blood and qi is called "Zha pain" (mass-related pain). "Zha" implies "false," meaning the pain floats and lacks a fixed location. This arises from pre-existing wind-cold and disharmony of blood and qi; due to scant blood discharge at delivery, this condition occurs. If not treated promptly, it often forms accumulations, interfering with menstruation: mild cases cause stagnation and涩 (roughness/stagnation), while severe cases lead to complete obstruction.
Childbirth damages blood and labors qi, making the interstices (pores and muscle spaces) deficient, allowing wind pathogen to invade. Pathogen contending with qi, unable to be excreted, causes false swelling. If the swelling is light and floating like blown air, it is pathogen contending with qi, constituting Qi Edema; if the skin is thin like a ripe plum, it transforms into Water Edema. Qi Edema resolves with sweating; Water Edema improves with promoting urination.
Postpartum visceral deficiency, or pre-existing wind-cold, or new exposure to cold, contends with qi, causing abdominal pain. If qi rebels upward, it also causes heart pain and hypochondriac pain. Over time, this may transform into Shan Zha (hernia-like masses).