冬时严寒，人有触冒之，寒气伏藏肌骨，未即病，至春而发，谓之温也。亦壮热，大体
与伤寒相似。又，冬时应寒而反温，温气伤人即病，亦令壮热，谓之温病。妊娠遇此病，热
搏于胎，皆损胎也。
冬时严寒，触冒伤之，藏于肌骨，夏至乃发，壮热，又为暑病。暑病，即热病也。此寒
气蕴积，发即有毒。妊娠遇之，多致堕胎也。
妊娠寒热病者，犹是时气之病也。此病起于血气虚损，风邪乘之，致阴阳并隔，阳胜则
热，阴胜则寒，阴阳相乘，二气交争，故寒热。其妊娠而感此病者，热甚则伤胎也。
夫疟者，由夏伤于暑，客于皮肤，至秋因劳动血气，腠理虚而风邪乘之，动前暑热，正
邪相击，阴阳交争。阳盛则热，阴盛则寒，阴阳更虚更盛，故发寒热；阴阳相离，寒热俱歇
。若邪动气至，交争则复发，故疟休作有时。
其发时节渐晏者，此由邪客于风府，循膂而下，卫气一日一夜常大会于风府，其明日日
下一节，故其作发日晏。其发日早者，卫气之行风府，日下一节，二十一日下至尾 ，二十
二日入脊内，上注于伏冲之脉，其气上行九日，出于缺盆之内，其气既上，故其病发更早。
其间日发者，由邪气风薄五脏，横连募原，其道远，其气深，其行迟，不能日作，故间
妊娠而发者，寒热之气迫伤于胎，多致损动也。
冬季严寒，人若触犯冒受寒气，寒气潜伏藏匿于肌肉与骨骼之间，当时并未立即发病，到了春季才发作，这称为“温病”。其症状也表现为高热，大体上与伤寒相似。另外，冬季本应寒冷却反而温暖，这种温邪伤人随即发病，同样导致高热，这也称为“温病”。孕妇若遭遇此类疾病，热邪搏结于胎元，都会损伤胎儿。
冬季严寒，触犯并受到寒气伤害，寒气藏匿于肌肉与骨骼，直到夏至时节才发作，表现为高热，这又被称为“暑病”。暑病，就是热病。这是因为寒气蕴积体内，一旦发作便具有毒性。孕妇若感染此病，多会导致流产（堕胎）。
孕妇患寒热交替的疾病，仍属于时气致病范畴。此病起因于血气虚损，风邪趁机侵入，导致阴阳之气相互阻隔，阳气偏胜则发热，阴气偏胜则发冷，阴阳二气相互侵扰、交争，因此出现寒热交替的症状。孕妇若感染此病，热势严重则会损伤胎元。
所谓疟疾，是由于夏季被暑邪所伤，邪气客居在皮肤之间，到了秋季因劳累导致血气波动，腠理（毛孔及皮肤纹理）空虚，风邪趁机侵入，触动之前潜伏的暑热，正气与邪气相互搏击，阴阳发生交争。阳气盛则发热，阴气盛则发冷，阴阳二气交替虚弱与强盛，因此发作时先寒后热；当阴阳之气暂时分离时，寒热症状便会停止。如果邪气再次触动，正气随之而来，二者再次交争就会复发，所以疟疾的发作有固定的时间规律。
如果发作时间逐渐推迟，这是因为邪气客居于风府穴，沿着脊柱向下移动。卫气一天一夜常在风府穴大会，第二天卫气下行一节，所以发作日期逐渐推后。如果发作时间逐渐提前，是因为卫气行经风府时每日下行一节，二十一日下行至尾骶部，二十二日进入脊内，向上注入伏冲脉，该气上行九天，出于缺盆穴内部，由于气机已经上行，所以病情发作得更早。
如果是隔日发作，是因为邪气迫近五脏，横向连接募原（脏腑之间的膜系），路径遥远，邪气深隐，运行迟缓，不能每日发作，所以隔日才发作。
In winter, when the cold is severe, if people are exposed to it, the cold qi lies hidden within the muscles and bones without causing immediate illness. It manifests in spring, which is termed "Wen Bing" (Warm Disease). Its symptoms also include high fever (Zhuang Re), generally resembling Shang Han (Cold Damage). Furthermore, if winter should be cold but turns warm instead, the warm pathogen attacks the body and causes immediate illness, also resulting in high fever; this is also called Wen Bing. If a pregnant woman encounters such diseases, the heat pathogen contends with the fetus, all of which damage the fetus.
When exposed to severe winter cold, injury occurs, and the cold qi hides within the muscles and bones. It manifests at the Summer Solstice (Xia Zhi) with high fever, which is also called "Shu Bing" (Summerheat Disease). Shu Bing is synonymous with Re Bing (Heat Disease). This is because accumulated cold qi becomes toxic upon manifestation. If a pregnant woman contracts this, it often leads to miscarriage (Duo Tai).
The disease of alternating chills and fever in pregnancy still belongs to the category of seasonal pathogens (Shi Qi). This illness arises from deficiency and impairment of blood and qi (Xue Qi), allowing wind pathogen (Feng Xie) to take advantage. This results in the obstruction of Yin and Yang. Excess Yang leads to heat, while excess Yin leads to cold. As Yin and Yang contend and their energies clash, alternating chills and fever occur. When a pregnant woman contracts this disease, severe heat will injure the fetus.
As for Nue (Malaria), it originates from summerheat injury in summer, where the pathogen resides in the skin. In autumn, due to labor and movement disturbing blood and qi, the cou li (pores and interstices) become deficient, allowing wind pathogen to invade. This stirs up the previously latent summerheat, causing righteous qi and pathogenic factors to clash and Yin-Yang to contend. Excess Yang causes heat, excess Yin causes cold. As Yin and Yang alternate between deficiency and excess, chills and fever manifest; when Yin and Yang temporarily separate, both chills and fever cease. If the pathogen moves again and qi arrives, they clash once more, causing recurrence; thus, malaria has periodic intervals of onset and remission.
If the onset time gradually delays, it is because the pathogen resides in Feng Fu (GV16, Wind Pool acupoint) and moves down along the Du Meridian (Spine). Wei Qi (Defensive Qi) gathers at Feng Fu once every day and night. The next day, it descends one vertebral level, so the onset date is delayed progressively. If the onset time advances earlier, it is because as Wei Qi travels through Feng Fu, it descends one level daily. After twenty-one days, it reaches the coccyx; on the twenty-second day, it enters the spine internally and ascends into the Fu Chong Mai (Hidden Rushing Vessel). This qi ascends for nine days and emerges inside Que Pen (ST12, Clavicle Acupoint). Since the qi has ascended, the disease manifests even earlier.
If the disease occurs every other day, it is because the pathogen presses against the Five Zang Organs and connects horizontally to the Mu Yuan (Sea of Origin/Membrane Source). The pathway is distant, the qi is deep, and its movement is slow, preventing daily occurrence; hence, it manifests intermittently.
For pregnant women contracting malaria, the chills and heat qi force and injure the fetus, often leading to fetal disturbance or damage.