阎氏诚斋曰∶妊娠出疹当以四物加减，而加条芩艾叶以安胎清热为主，则胎不动而麻
疹自出矣。然热毒蒸胎，胎多受伤，但胎虽伤而母实无恙也。盖疹与痘不同，痘宜内实，以
痘当从外解，故胎落毒瓦斯乘虚而内攻其母亡；疹宜内虚，以疹当从内解，故胎落热毒随胎而
下其母存。虽然与其胎去而母存，孰若子母两全之为愈也。且古之徒知清热以安胎，不思疹
未出而即以清热为事，则疹难出而内热愈深。是欲保胎反足以伤胎也。宜轻扬表托则疹出
而热自清，继以滋阴清解则于疹于胎两不相碍，不安胎而胎自安矣。如疹出不快宜白虎汤
合用升麻葛根汤倍加元参牛蒡子治之，胎气上冲急用苎根艾叶煎汤磨槟榔服之，再以四
物汤进之，如又腹疼腰酸即知胎有必堕之机，如胎堕即以产法论治矣。
升麻葛根汤 此解表发散之方也，表热壮盛，邪实于表，经曰∶轻可去实，故用升麻葛
根以疏表，所以然者升麻能解疫毒，升阳于至阴之下，以助发生之气；葛根能解热毒，兼疏
营卫，以导起发之机。二味之外又加甘草佐之，以和在表之气，芍药佐之以和在里之营，
去其实邪，和其营卫，风寒自解，麻疹自出。
凡妇人方产之后或半月左右适逢出痘疹者，此无胎系累，惟气血尚虚，治宜大补营卫
为主。若出多者，则加连翘牛蒡之类，余即照
常一例而治，不必多疑反生他误。
阎氏诚斋说：孕妇患麻疹应当以四物汤为基础进行加减，并加入黄芩、艾叶，以安胎和清热为主要治疗原则，这样胎气稳固而麻疹自然透发。然而热毒熏蒸胎儿，胎儿多会受伤，只是虽然胎儿受损但母亲通常安然无恙。大概是因为麻疹与天花不同，天花适宜让体内正气充实，因为天花邪气应从体表解除，所以如果胎元坠落，毒瓦斯就会趁虚内攻导致母亲死亡；麻疹适宜让体内保持空虚状态，因为麻疹邪气应从内部化解，所以如果胎元坠落，热毒会随着胎元排出而母亲得以存活。虽然与其失去胎儿而保全母亲，不如母子两全更好。况且古人只知道用清热的方法来安胎，却没想到在麻疹尚未发出时就急于清热，会导致麻疹难以透出且内热更加深重。这是想要保护胎儿反而足以伤害胎儿。应当使用轻扬升散的方法托举疹毒，使麻疹透出而热势自清，随后采用滋阴清解的方法，这样对麻疹和胎儿都没有妨碍，不用刻意安胎而胎气自然安定。如果麻疹出得不顺畅，宜将白虎汤与升麻葛根汤合用，并重加玄参、牛蒡子来治疗；如果胎气上冲，急用苎麻根、艾叶煎汤，磨服槟榔，然后再服用四物汤；如果又出现腹痛腰酸，就知道胎儿有必然堕落的迹象，如果胎儿已经堕落，就按照产科方法进行治疗了。
升麻葛根汤：这是解表发散的方剂。如果表热壮盛，邪气实于体表，经书说：“轻可去实”，所以用升麻、葛根来疏解表邪。之所以这样做，是因为升麻能解除疫毒，提升阳气于至阴之下，以助发生之气；葛根能解除热毒，兼疏营卫，以引导疹毒起发之机。在这两味药之外又加入甘草辅助，以调和在表之气，芍药辅助以调和在里的营血，去除实邪，调和营卫，风寒自然解除，麻疹自然透出。
凡是妇女分娩后或半个月左右恰逢出痘疹的，这是因为没有胎儿牵累，只是气血尚且虚弱，治疗应以大补营卫为主。如果疹子出得多的，则加入连翘、牛蒡子之类的药物，其余就照常例治疗，不必多疑以免产生其他误治。
Yan Shizhai stated: For pregnant women suffering from measles (Rash), treatment should be based on Siwu Tang (Four Substances Decoction) with modifications, adding Huangqin (Scutellariae Radix) and Aiyè (Artemisiae Argyi Folium) to primarily stabilize the fetus and clear heat. In this way, the fetal qi will remain stable, and the measles will naturally erupt. However, heat-toxin steaming the fetus often causes fetal injury; although the fetus may be damaged, the mother usually remains unharmed. This is because measles differ from smallpox (Variola). Smallpox requires internal solidity because its pathogenic factors should resolve from the exterior; thus, if the fetus is lost, toxic vapors attack inward through deficiency, leading to the mother's death. Measles, conversely, require internal emptiness because its pathogenic factors should resolve from within; thus, if the fetus is lost, heat-toxin exits downward with the fetus, allowing the mother to survive. Nevertheless, it is better for both mother and child to survive than for the mother to survive at the cost of the fetus. Moreover, ancients only knew to use heat-clearing methods to stabilize the fetus, failing to realize that clearing heat before the rash has erupted makes it difficult for the rash to emerge and deepens internal heat. Thus, attempting to protect the fetus inadvertently harms it. One should employ light, ascending, and dispersing methods to support the eruption of the rash, so that as the rash emerges, the heat clears spontaneously. Subsequently, using yin-nourishing and heat-clearing methods ensures neither the rash nor the fetus is hindered; without explicitly stabilizing the fetus, the fetal qi stabilizes itself. If the rash fails to erupt smoothly, combine Baihu Tang (White Tiger Decoction) with Shengma Gegen Tang (Cimicifugae et Puerariae Decoction), heavily increasing Xuanshen (Scrophulariae Radix) and Niubangzi (Arctii Fructus). If fetal qi rushes upward, urgently decoct Zhugen (Bambusae Caulis Interjointis) and Aiyè (Artemisiae Argyi Folium), grind Binglang (Arecae Semen) into the soup, administer it, and then advance Siwu Tang (Four Substances Decoction). If abdominal pain and lower back soreness occur, one knows the fetus is destined to abort; if abortion occurs, treat according to obstetric protocols.
Shengma Gegen Tang (Cimicifugae et Puerariae Decoction): This is a formula for resolving the exterior and inducing sweating. When exterior heat is vigorous and pathogens are excess in the exterior, the Classics state: "Light substances can remove excess." Therefore, Shengma (Cimicifugae Rhizoma) and Gegen (Puerariae Lobatae Radix) are used to vent the exterior. The reason is that Shengma (Cimicifugae Rhizoma) resolves epidemic toxins and raises yang qi from beneath extreme yin, assisting the generating qi; Gegen (Puerariae Lobatae Radix) resolves heat-toxins and simultaneously vents Ying and Wei, guiding the mechanism of rash eruption. Besides these two herbs, Gancao (Glycyrrhizae Radix et Rhizoma) is added to harmonize the qi in the exterior, and Shaoyao (Paeoniae Radix Alba) is added to harmonize the Ying blood in the interior. By removing excess pathogens and harmonizing Ying and Wei, wind-cold resolves spontaneously, and the measles erupt naturally.
For women who experience smallpox or measles about half a month after delivery, there is no burden of a fetus, but Qi and Blood are still deficient. Treatment should primarily focus on greatly tonifying Ying and Wei. If the eruption is profuse, add Lianqiao (Forsythiae Fructus) and Niubangzi (Arctii Fructus); otherwise, treat according to standard protocols without excessive doubt to avoid further errors.