时气之病发复者，是四时之间，忽有非节之气伤人，客于肌肤，搏于血气，蕴积则变壮
热头痛。热退之后，气血未和，腑脏热势未尽，或起早劳动，或饮食不节，故其病重发，谓
之复也。然发复多重于初病者，血气已虚，重伤故也。
温病者，是冬时严寒，人有触冒之，寒气入肌肉，当时不即发，至春得暖气而发，则头
痛壮热，谓之温病。又冬时应寒而反暖，其气伤人即发，亦使人头痛壮热，谓之冬温病。凡
邪之伤人，皆由触冒，所以感之。小儿虽不能触冒，其乳母抱持解脱，不避风邪冷热之气，
所以感病也。
温病者，是冬时严寒，人有触冒之，寒气入肌肉，当时不即发，至春成病，得暖气而发
，则头痛壮热，谓之温病。又冬时应寒而反温，其气伤人，即发成病，使人头痛壮热，谓之
冬温病也。其下利者，是肠胃宿虚，而感于温热之病，热气入于肠胃，与水谷相搏，肠虚则
泄，故下利也。
温病者，是冬时严寒，人有触冒之，寒气入肌肉，当时不即发，至春得暖气而发，则头
痛壮热，谓之温病。又冬时应寒而反温，其气伤人，即发成病，谓之冬温病，并皆头痛壮热
。其鼻衄者，热乘于气，而入血也。肺候身之皮毛，主于气，开窍于鼻。温病则邪先客皮肤
，而搏于气，结聚成热，热乘于血，血得热则流散，发从鼻出者，为衄也。
凡候热病鼻欲衄，其数发汗，汗不出，或初染病已来都不汗，而鼻燥喘息，鼻气有声，
如此者，必衄也。小儿衄，止至一升数合，热因得歇；若至一斗数升，则死矣。
时气病复发，是指在四季交替之间，突然遇到不合时令的邪气侵袭人体，邪气客居于肌肤，与血气相搏结，蕴积郁滞从而转化为高热、头痛。热势退去之后，气血尚未调和，脏腑内的热势也未完全清除，此时如果早起劳作，或者饮食没有节制，就会导致疾病再次发作，这被称为“复”。然而，复发的病情往往比初次发病更重，这是因为血气已经虚弱，又遭受了二次伤害的缘故。
温病，是指冬季严寒之时，人触冒了寒气，寒气侵入肌肉，当时并没有立即发病，到了春季得到暖气的激发才发作，出现头痛和高热，这就叫做温病。另外，冬季本该寒冷却反而温暖，这种反常的气候伤人后立即发病，也会使人出现头痛和高热，这叫做冬温病。凡是邪气伤人，都是因为触冒了不正之气而感得的。小儿虽然不能主动触冒风寒，但如果乳母在抱持或照顾孩子时疏忽大意，不避开风邪和冷热之气，孩子因此也会感病。
温病，是指冬季严寒之时，人触冒了寒气，寒气侵入肌肉，当时并没有立即发病，到了春季形成病症，得到暖气激发而发作，出现头痛和高热，这就叫做温病。另外，冬季本该寒冷却反而温暖，这种气候伤人，立即发病成病，使人出现头痛和高热，这就叫做冬温病。其中伴有下利的，是因为肠胃素来虚弱，又感染了温热之邪，热气进入肠胃，与水谷相互搏结，肠道虚弱则导致泄泻，所以出现下利。
温病，是指冬季严寒之时，人触冒了寒气，寒气侵入肌肉，当时并没有立即发病，到了春季得到暖气激发而发作，出现头痛和高热，这就叫做温病。另外，冬季本该寒冷却反而温暖，这种气候伤人，立即发病成病，叫做冬温病，这些病症都表现为头痛和高热。其中出现鼻衄（鼻出血）的，是因为热邪乘袭气分，进而深入血分。肺主司身体的皮毛，主管气，开窍于鼻。温病的邪气首先客居于皮肤，并与气相搏结，聚集成热，热邪乘入血分，血液受热则流动散乱，从鼻子流出，这就是衄血。
凡是诊察热病，若见患者鼻孔干燥欲作衄血状，此前多次发汗但汗不出，或者从初染病以来从未出汗，且伴有鼻燥、喘息、鼻中呼吸有声等症状，这种情况下，必然会发生鼻衄。小儿发生鼻衄，出血量止住在一升到几合之间，热势就能得以平息；如果出血量达到一斗多升，那么就会死亡。
Recurrence of seasonal qi diseases refers to the situation where, during the transitions of the four seasons, sudden abnormal climatic factors invade the human body. The pathogenic factor lodges in the skin and muscles, contends with the blood and qi, and accumulates to transform into high fever (Zhuang Re) and headache. After the heat subsides, if the blood and qi have not yet harmonized, and the heat trend within the fu organs has not completely dissipated, early labor or irregular diet may cause the disease to relapse. This is termed "recurrence" (Fu). However, recurrence is often more severe than the initial illness because the blood and qi are already deficient, suffering a secondary injury.
Wen Bing (Warm Disease) occurs when, during the severe cold of winter, a person is exposed to cold pathogens. The cold qi enters the muscles but does not manifest immediately. When spring arrives and warmth stimulates the body, it manifests as headache and high fever, which is called Wen Bing. Additionally, if winter should be cold but turns warm instead, this abnormal climate invades the person and causes immediate onset, also resulting in headache and high fever; this is called Dong Wen Bing (Winter Warm Disease). All pathogenic invasions occur due to exposure to improper climatic factors. Even infants who cannot actively expose themselves may contract disease if their nursing mother, while holding or caring for them, fails to shield them from wind-cold or wind-heat pathogens.
Wen Bing occurs when, during the severe cold of winter, a person is exposed to cold pathogens. The cold qi enters the muscles but does not manifest immediately. By spring, the condition forms, and upon stimulation by warmth, it manifests as headache and high fever, termed Wen Bing. Furthermore, if winter should be cold but turns warm instead, this climate invades the person, causing immediate onset with headache and high fever, termed Dong Wen Bing. In cases accompanied by diarrhea (Xia Li), it is due to pre-existing deficiency in the intestines and stomach combined with infection by warm-heat pathogens. The heat qi enters the intestines and stomach, contending with food and drink. Since the intestines are deficient, diarrhea ensues.
Wen Bing occurs when, during the severe cold of winter, a person is exposed to cold pathogens. The cold qi enters the muscles but does not manifest immediately. By spring, upon stimulation by warmth, it manifests as headache and high fever, termed Wen Bing. Additionally, if winter should be cold but turns warm instead, this climate invades the person, causing immediate onset, termed Dong Wen Bing. Both present with headache and high fever. In cases presenting with epistaxis (Bi Nu), the heat pathogen attacks the qi level and penetrates into the blood level. The Lung governs the skin and hair, controls Qi, and opens into the nose. In Wen Bing, the pathogen first lodges in the skin, contends with Qi, aggregates into heat, and then the heat penetrates the blood. Blood heated becomes turbulent and scatters, flowing out from the nose, which is defined as Bi Nu (epistaxis).
When observing heat diseases, if the patient exhibits dryness in the nose indicating impending epistaxis, and previous attempts at sweating therapy failed to produce sweat, or if no sweat occurred since the initial infection, accompanied by nasal dryness, panting, and audible breathing sounds from the nose, epistaxis will inevitably occur. If an infant experiences epistaxis and the bleeding stops after losing one sheng to several he (a small unit of volume), the heat will subside. However, if the bleeding reaches one dou or more (a large unit of volume), death will result.