头额目痛，颇似伤寒，然太阳、阳明头痛，不至于倾侧难举，而此则头痛如劈，两目昏晕，势若难
支。总因毒火达于两经，毒参阳位。用釜底抽薪之法，彻火下降，其痛立止，其疹自透。误用辛香表
散，燔灼火焰，必转闷证。
骨与腰，皆肾经所属。其痛若此，是淫热之气已流于肾经。误用表寒，死不终朝矣。
热宜和不宜燥，至于遍体炎炎，较之昏沉肢冷者，而此则发扬，以其气血尚可胜毒，一经清解，而疹自
透，妄肆发表，必至内伏。
有似乎静而忽躁，有似乎躁而忽静，谓之不常，较之癫狂，彼乃发扬，而此则遏郁，总为毒火内扰，
以至坐卧不安。
寤从阳，主于上；寐从阴，主于下。胃为六腑之海，毒火壅遏，阻格上下，故不寐。
初病周身如冰，色如蒙垢，满口如霜，头痛如劈，饮热恶冷，六脉沉细。此阳极似阴，毒之隐伏者也。
重清内热，使毒热外透。身忽大热，脉转洪数，烦躁谵妄，大渴思冰，症虽枭恶，尤易为力。若遇庸手，妄投桂、附，
药不终剂，死如服毒。
四肢属脾，至于逆冷，杂症见之，是脾经虚寒、元阳将脱之象。惟疫则不然，通身大热，而四肢独冷。
此烈毒壅遏脾经，邪火莫透。重清脾热，手足自温。
头额部及眼部疼痛，看起来很像伤寒病，然而太阳经和阳明经引起的头痛，不会发展到头部倾斜、难以抬举的程度，而此病却是头痛如刀劈一般，双眼昏花眩晕，病情势态似乎难以支撑。这总归是因为毒火通达于这两条经络，毒邪侵犯阳位。应当采用“釜底抽薪”的方法，使火热之邪彻底下降，头痛立刻停止，皮疹自然透出。如果错误地使用辛香发散的药物，如同火上浇油，必然转变为闷证（热毒内闭）。
骨骼与腰部，都属于肾经所管辖。如果出现这种疼痛，说明淫热的邪气已经流注到肾经。如果错误地用寒凉药物解表，患者不到半天就会死亡。
热证适宜用平和之法调理，而不宜用燥烈之法。至于全身炽热，比起那些昏沉、四肢发冷的情况，此病表现为热势外扬，这是因为患者的气血尚能抵御毒邪，一经清热解表，皮疹自然透出；如果胡乱使用发表药物，必然导致热毒内伏。
有的时刻看似安静却突然躁动，有的时刻看似躁动却突然安静，称为“不常”。这与癫狂症不同，癫狂是热势发扬，而此病则是热毒遏郁，总归是毒火在内扰乱，以至于坐卧不安。
醒时属阳，主要在上部；睡时属阴，主要在下部。胃是六腑的海，毒火壅塞遏制，阻格了上下气机的交通，所以导致失眠。
初起病时全身冰冷，面色像蒙着污垢，满口苍白如霜，头痛如刀劈，想喝热水却厌恶冷食，六脉沉细。这是阳极似阴的表现，是毒邪隐伏在体内的征象。此时应着重清解内热，使毒热向外透发。身体忽然变得大热，脉搏转为洪数，烦躁谵语妄言，极度口渴想喝冰水，症状虽然凶险恶劣，但治疗相对容易。如果遇到庸医，胡乱投用桂枝、附子等温热药，药还没服完一剂，病人就会像中毒一样死去。
四肢属于脾经管辖，出现逆冷现象，在杂病中见到，是脾经虚寒、元阳即将脱失的征象。只有疫病不是这样，全身大热，唯独四肢发冷。这是烈毒壅塞遏制脾经，邪火无法透达。着重清解脾经的热毒，手足自然会温暖。
筋脉属于肝，依赖血液来滋养。热毒流注到肝经，疹毒不能寻找孔窍排出体外，筋脉受到热毒的冲激，所以出现抽搐、惊惕，如同受惊一般。
Pain in the forehead and eyes resembles *Shanghan* (Cold Damage), yet headaches of the Taiyang (Greater Yang) and Yangming (Yang Brightness) meridians do not progress to the point where the head tilts and is difficult to lift. In this condition, however, the headache is like being split by an axe, with dim vision and dizziness, appearing as if the body cannot support itself. This is entirely due to toxic fire reaching these two meridians, with toxin invading the Yang positions. The method of "drawing wood from under the cauldron" (removing the root cause) should be used to thoroughly descend the fire; once done, the pain will stop immediately, and the rash will naturally emerge. Mistakenly using acrid-aromatic dispersing agents is like adding fuel to a blazing fire, inevitably transforming into a *Men Zheng* (Closed Syndrome).
Bones and the lower back belong to the Kidney Meridian. Pain of this nature indicates that excessive heat has flowed into the Kidney Meridian. Mistakenly using cold-natured drugs to release the exterior would lead to death before the day ends.
Heat conditions are suited for harmonizing rather than drying. Regarding general body burning heat, compared to cases of lethargy and cold limbs, this condition manifests with heat flourishing outward because the Qi and Blood can still overcome the toxin. Once cleared and resolved, the rash emerges naturally; recklessly using exterior-releasing methods will cause the toxin to become internally concealed.
There are moments that seem quiet but suddenly become restless, and moments that seem restless but suddenly become quiet, termed "inconstancy." Unlike mania (*Dian Kuang*), which involves flourishing heat, this condition involves suppressed and depressed heat. It is generally caused by internal disturbance of toxic fire, leading to restlessness in sitting or lying down.
Waking follows Yang and governs the upper part; sleeping follows Yin and governs the lower part. The Stomach is the sea of the Six Fu Organs. When toxic fire obstructs and blocks, preventing the communication between upper and lower, insomnia results.
In the early stage, the whole body feels like ice, the complexion looks obscured like dirt, the mouth appears frosty white, the headache is like splitting, there is a desire for hot drinks but aversion to cold, and the six pulses are deep and fine. This is "extreme Yang resembling Yin," indicating hidden toxin. Heavy clearing of internal heat is required to allow the toxic heat to emerge externally. Suddenly, the body becomes very hot, the pulse turns flooding and rapid, accompanied by irritability, delirious speech, and extreme thirst for ice water. Although the symptoms are fierce and malignant, they are relatively easy to treat. If met by incompetent physicians who recklessly administer Guizhi Tang (Cinnamon Twig Decoction) and Fuzi (Prepared Aconite Root), the patient may die as if poisoned before finishing one dose.
The four limbs belong to the Spleen. Cold reversal in the limbs, when seen in miscellaneous diseases, indicates deficiency-cold of the Spleen Meridian and impending collapse of Yuan Yang (Original Yang). Epidemic diseases are different: the whole body is extremely hot, while only the limbs are cold. This is due to fierce toxin obstructing the Spleen Meridian, preventing the evil fire from penetrating. Heavily clearing Spleen heat will naturally warm the hands and feet.
Sinews belong to the Liver and rely on Blood for nourishment. When heat-toxin flows into the Liver Meridian, the rash toxin cannot find an exit through the orifices. The sinews and vessels are impacted by it, resulting in twitching and palpitations akin to fright.