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[Scriptural Meaning]
If one is injured by cold in winter, one will inevitably suffer from warm disease (Wen Bing) in spring. ○ If one fails to conserve essence (Jing) in winter, one will inevitably suffer from warm disease in spring. ○ For those who contract cold damage (Shang Han) and transform into warm disease, if it occurs before the Summer Solstice, it is called warm disease. ○ The pulse of the Taiyang (Greater Yang) meridian, if the cheekbone area shows a reddish luster, indicates heat disease. If the pathogenic factor has not yet interacted with the healthy qi (meaning the condition is not yet critical), and it is said that sweating can occur now, waiting for the appropriate time will lead to recovery; however, if the Taiyang pulse appears simultaneously with the Jueyin (Terminal Yin) pulse (indicating a clash between Yin and Yang meridians), death will occur within three days, as the heat disease internally connects to the Kidney. The pulse of the Shaoyang (Lesser Yang) meridian, if the front of the cheek shows a reddish luster, indicates heat disease. If the pathogenic factor has not yet interacted with the healthy qi, and it is said that sweating can occur now, waiting for the appropriate time will lead to recovery; however, if the Shaoyang pulse appears simultaneously with the Shaoyin (Lesser Yin) pulse, death will occur within three days. ○ The Yellow Emperor asked: In cases of warm disease where sweating is followed immediately by recurrent fever, with a rapid and restless pulse that does not diminish after sweating, accompanied by delirium and inability to eat, what is the name of this disease? Qibo replied: This disease is named "Yin-Yang Jiao" (Interaction of Yin and Yang), and those with this interaction die. The Yellow Emperor asked: I wish to hear the explanation. Qibo said: Human sweating is generated from grain (food), and grain generates essence. When pathogenic factors contend with healthy qi in the muscles and bones and sweating occurs, it means the pathogen is retreating and essence is victorious. With victorious essence, one should be able to eat and not have recurrent fever. Recurrent fever indicates the presence of pathogenic factors. Sweat is derived from essence. Now, sweating followed immediately by recurrent fever indicates that the pathogen is exuberant. Inability to eat means essence receives no supplementation. With the disease lingering, life can end instantly. (From *Su Wen*)

There are nine types of heat diseases that should not be treated with acupuncture: 1. No sweating, redness of the large cheekbones, and hiccups indicate death; 2. Diarrhea with severe abdominal fullness indicates death; 3. Unclear vision with persistent heat indicates death; 4. Elderly people and infants with heat and abdominal fullness indicate death; 5. No sweating, vomiting, and hematochezia indicate death; 6. Ulceration of the tongue root with persistent heat indicates death; 7. Coughing with epistaxis, no sweating, or sweating that does not reach the feet indicate death; 8. Marrow heat indicates death; 9. Heat with spasms indicates death. (From *Ling Shu*)

[Philosophical Discourse]
Fever accompanied by thirst and aversion to cold absent characterizes warm disease. ○ After sweating, if the body remains burning hot, it is named Feng Wen (Wind-Warmth). In Feng Wen disease, the pulses at the cun, guan, and chi positions on both hands are all floating, there is spontaneous sweating, heaviness of the body, excessive sleepiness, snoring breath, and difficulty speaking. If mistakenly treated with purgation, it leads to difficult urination, fixed gaze, and incontinence of urine and stool; if mistakenly treated with fire therapy, mild cases develop yellow discoloration, while severe cases resemble convulsions and epilepsy with occasional twitching; if treated with fire fumigation, one error may prolong the illness, but two errors will hasten death. (Zhang Zhongjing)

Zhang Zhongjing’s writings detail the treatment of Shang Han (Cold Damage) but are brief regarding Warm Disease, as the methods are intermixed with those for Shang Han. Later generations failed to understand the principles, leaving the syndrome of Spring Warmth without established rules to follow. Moreover, diseases caused by exposure to cold pathogens are few, while those triggered by warm pathogens are many; cold pathogens injure three out of ten people, whereas warm pathogens injure seven out of ten. Among ancient and modern medical texts, no deficiency is greater than this. I specifically comprehend the purport of *Nei Jing* to elucidate the profound secrets Zhang Zhongjing did not explicitly state. What is this purport? *Nei Jing* states: "Injury by cold in winter leads to warm disease in spring." This is a major principle. It also states: "Failure to conserve essence in winter leads to warm disease in spring." This is another major principle. If one is injured by cold in winter AND fails to conserve essence, leading to simultaneous onset in spring, this is the third major principle. By citing these three principles to discuss warm syndromes and detailing their treatment, one can align them with the transmission patterns of the Three Yang and Three Yin meridians. Generally, injury by cold in winter implies pathogens hiding in the skin and muscles, which corresponds to pathogens invading the Three Yang meridians; failure to conserve essence implies pathogens entering the Yin organs, corresponding to pathogens invading the Three Yin meridians. Pathogens in the Yang aspect are superficial and easy to treat; pathogens in the Yin aspect are deep and difficult to cure. Therefore, patients with warm disease may undergo diaphoresis three to five times without resolution of exterior symptoms, or purgation three to five times without resolution of interior symptoms. They appear to be in the exterior but seem interior; they appear interior but seem exterior. Using warming herbs causes immediate destruction of Yin fluids; using cooling herbs causes immediate extinction of Yang Qi. All critical conditions seen in Shang Han can also occur in warm disease, due to deficiency of healthy qi and excess of pathogenic factors overwhelming the body. Heat syndromes are particularly common, accounting for eight or nine out of ten cases. This is because True Yin has been long consumed by heat pathogens, unable to restrain hyperactive Yang, causing the fire to rage uncontrollably. Thus, only when the pathogen recedes and a thread of Yin Qi remains can the patient survive. However, most present with emaciation, dry skin, depleted fluids, and wasted muscles, requiring a year of careful regulation to recover their pre-illness constitution. This is largely because physicians are ignorant of the pathology, use inappropriate medications, fail to resolve the pathogen, and allow the disease to linger, making survival uncertain. ○ Injury by cold in winter hides in the skin and muscles, manifesting upon exposure to the warm Qi of spring. The skin and muscles are governed by the Stomach Meridian of Foot-Yangming. Long-stagnant heat in the Yangming meridian, once released and reaching the Taiyang meridian externally, may present as slight aversion to cold followed by fever; or high fever with no aversion to cold; or exterior symptoms unresolved while interior excess arises; or pathogens lingering solely in the Taiyang meridian; or moving from Yangming to Taiyang; or returning from Taiyang to Yangming without transmitting to other meridians; or transmitting from the Three Yin to the Stomach Fu organ; or circulating from Taiyang through the meridians to the Three Yin, similar to winter Shang Han. Generally, the Taiyang and Yangming meridians are the strongholds of pathogens. In Taiyang, signs of cold injuring the Ying (Nutritive) level are rarely seen; in Yangming, heat syndromes such as delirium, macules, epistaxis, blood stasis, jaundice, and spleen constraint often coexist. Methods of releasing the exterior that do not avoid heat merely exacerbate warm disease. Furthermore, the treatment principles for Taiyang syndromes differ from those in winter. While wind injuring the Wei (Defensive) level may occur in spring, cold injuring the Ying level does not; moreover, pathogens reaching Taiyang from Yangming do not necessarily pass through Taiyang to Yangming and Shaoyang. Thus, the meridian-based differentiation and treatment for warm disease differ significantly from Shang Han. Yet, popular formulas simply count days and meridians, claiming transmission is complete by a certain day. Ultimately, they cannot grasp the affected meridians to provide effective treatment. This is like a blind person leading other blind people into a pit. ○ In winter, Yang Qi hides within extreme Yin. *Nei Jing* teaches that during this time, one should remain hidden and deeply conserve essence. Hence, "failure to conserve essence in winter leads to warm disease in spring." This reveals the origin of the disease as a certain and inevitable principle. Essence movement opens the gates, allowing Qi to leak and cold wind to enter. Repeated opening and leaking allow repeated invasion. The Kidney, which governs closure, mistakes the thief for a son; the thief has no exit, and they coexist peacefully, worsening over time. By spring, Earth Qi rises, Liver Wood takes command. The Liver governs dispersion, and Wood governs wind, attracting Kidney pathogens to move vigorously internally and plunder the family treasures (essence). Since the pathogen is deep-seated and cannot be quickly expelled, the patient feels confused and helpless. The fever originates in the marrow; the patient feels intense heat internally, but the skin is not hot to the touch. Regardless of dispersing treatments, sweat does not expel the pathogen, merely damaging fluids and leading to crisis. Compared to winter cold injury, this is twice as severe. ○ Note: The principle of "failure to conserve essence" comes from *Nei Jing*, not Zhang Zhongjing. However, Zhang’s first discussion on warm disease hints at it. He says: "After sweating, if the body is burning hot, it is named Feng Wen... pulses are floating, spontaneous sweating, body heaviness, sleepiness, snoring, difficulty speaking. If purged, urinary difficulty, fixed gaze, incontinence; if fired, yellowing, convulsions... one error delays death, two errors hasten it." This profound truth has been ambiguous for millennia. People fail to realize: if it is named warm disease, it is an external seasonal contraction; why are sweating, purging, and fire therapies considered contraindications? The reason is that heat pathogens accumulate in Shaoyin for a long time, and Kidney essence water is already damaged. Adding sweating, purging, and fire therapies that consume Yin constitutes a contraindication. Spontaneous sweating, body heaviness, sleepiness, snoring, and speech difficulties are all original syndromes of Shaoyin. The Bladder is the mansion of the Kidney, so Shaoyin syndromes manifest. If purged, Bladder Yin is injured, leading to fixed gaze and incontinence as Kidney essence fails to nourish upward and Kidney Qi escapes. If fired, Yin is further depleted, pathogens unchecked, leading to convulsions. "One error, then another" refers to the mistake of sweating, purging, and firing; committing one is unacceptable, let alone repeating them. Thus, the warm disease of "failure to conserve essence" is clearly evident. ○ Note: "After sweating, if the body is burning hot, it is named Feng Wen" describes the warm disease of "failure to conserve essence" completely. Generally, after sweating, external pathogen fever subsides; only in Feng Wen does fever intensify after sweating, indicating the heat was originally in the marrow and only emerged to the surface after sweating. The term "Feng Wen" carries subtle meaning, similar to "Lao Feng" (Labor Wind) in *Nei Jing*. Lao Feng results from exhausting the Kidney and generating wind. Thus, those who fail to conserve essence in winter exhaust their Kidneys, allowing wind to blaze internally. Sweating brings out Kidney-related symptoms like sweating, heaviness, sleepiness, snoring, and speech difficulty. Without sweating, these symptoms would remain latent. Treating internal Kidney wind with external sweating, purging, and fire therapies accelerates death. Later generations, not knowing Feng Wen, claimed there were separate Wind-Warmth, Damp-Warmth, Warm-Toxin, and Warm-Epidemic diseases. They argued that re-exposure to wind changes warmth into wind-warmth, disconnecting it from symptoms like heaviness and snoring. This is dreaming within a dream. A skeptic asked: *Nei Jing* says cold toxin hides in skin/muscles and manifests in spring as warm disease, never mentioning bone marrow. Is your claim that cold hides in bone marrow correct? I replied: This is exactly what *Nei Jing* says. The Yellow Emperor asked about Wen Nue (Warm Malaria): Qibo said it originates from wind in winter, with cold air hiding in the marrow. In spring, Yang Qi expands, but the pathogen cannot exit. With summer heat, brain marrow melts, muscles waste, pores open, and exertion forces the pathogen out with sweat. This disease hides in the Kidney, emerging from inside to outside. Yin is deficient, Yang is exuberant, causing heat; when Yang declines, Qi returns inward, causing Yin deficiency and cold. Hence, heat precedes cold, named Wen Nue. If Wen Nue is like this, how much more so is warm disease? ○ Note: Winter cold injury plus failure to conserve essence leads to dual-pathogen onset in spring. Cold injury affects Yang, governed by Taiyang Bladder; failure to conserve essence affects Yin, governed by Shaoyin Kidney. This matches the "Two-Feelings" (Liang Gan) Shang Han pattern where Taiyang and Shaoyin are affected simultaneously, causing headache, dry mouth, irritability, and thirst. However, Shang Han moves from exterior to interior, deepening over three days to cover all six meridians. Warm disease moves from interior to exterior; exiting via Taiyang, it cannot transmit to all meridians, usually remaining confined to these two. Thus, dual-feeling warm disease has potential for survival. I treated a case with Mahuang Fuzi Xixin Tang for sweating, followed by Fuzi Xiexin Tang for purging, curing it in two doses. This shows Zhang’s rigorous methods depend on skillful application. ○ Note: Dual-onset warm disease resembles Half-Exterior Half-Interior syndromes, but using Ban Xia Xie Xin Tang type remedies worsens it. Why? Because this syndrome involves Taiyang and Shaoyin as root and branch, unrelated to Shaoyang’s half-exterior half-interior. Medication must follow the meridians. Treating both: sweating from Taiyang disturbs Shaoyin blood; warming Shaoyin aids Taiyang pathogens. Zhang stated Two-Feelings Shang Han is fatal; how much more so under incompetent doctors? The secret lies in "treatment has sequence; releasing exterior and attacking interior are fundamentally different." These twelve characters are the key to Two-Feelings transmission and the perfect rule for warm disease. Understanding this ensures 80-90% success. ○ Note: Warm diseases may show exterior signs first, then transmit interior. Heat stagnates in pores, cannot vent, returns interior to become purgable. Unlike Shang Han starting exteriorly. Shang Han starts exteriorly, so mistaken purging causes many changes; warm disease doesn't always start exteriorly, so purging isn't always a major error. However, stagnant heat should vent outward; mistaken purging drawing pathogens deeper is incorrect. ○ Note: Warm diseases often have mixed exterior signs but predominantly interior pathology, so thirst is common. Treatment should focus on interior, with muscle-releasing as adjunct; sometimes treating interior resolves exterior. Mistaken purging causing harm applies to epidemic cold in spring/summer where pathogens are purely exterior. These cannot be equated with warm disease. ○ Note: Warm disease patients may have recent wind-cold exposure or weak exterior Qi intolerant to wind/cold. Wei deficiency causes aversion to wind; Ying deficiency causes aversion to cold. This does not exclude warm diagnosis, though symptoms are usually mild. Except for Taiyang, this is rare. ○ Note: Warm disease lacks the Wind-injuring-Wei/Cold-injuring-Ying distinction and does not require Guizhi Tang or Mahuang Tang. Even exterior formulas like Baidu San or Shen Su Yin are only suitable before spring heat arrives; if used late, their warming nature is suspect, let alone the acrid-hot Guizhi and Mahuang. Zhang didn't forbid them for two reasons: 1. Removing them leaves no exterior formula for Three Yin; 2. Misuse in winter was warned against, making spring warnings redundant. Critics focusing on their heat ignore the "failure to conserve essence" context. Only recognizing their necessity in spring/summer reveals Zhang’s genius. ○ Note: Zhang uses Guizhi Tang for exterior warm disease to indicate mild sweating; he uses Dachengqi Tang for interior to indicate urgent purging. Ignorants think exterior is light and interior heavy. This is wrong. Exterior and interior are equal. The concern is Yangming heat consuming stomach fluids. When sweating, fear excessive loss of fluids; when purging, fear delay in preserving fluids. ○ Zhang used Guizhi for winter Taiyang wind-strike, not specifically for spring warm disease. Spring warm disease using Guizhi requires acrid-cool adjuvants. For essence-deficient warm disease (Shaoyin), Guizhi’s warming dispersion is necessary because Shaoyin is Yin with Cold as its manifestation; non-warming methods cannot disperse. Even Mahuang Fuzi may be needed, supplemented heavily with Yin-nourishing herbs like Shaoyao, Dihuang, or pig bile. Modern doctors, fearing warmth, use Qianghuo, Chaihu, Ge Gen, treating Taiyang but neglecting Shaoyin, failing to cure. ○ Note: Shang Han Shaoyin syndrome transmits from Three Yang. This warm disease involves direct Shaoyin-Bladder infection, so transmission rules don't apply. Only the Two-Feelings pattern (Taiyang-Shaoyin simultaneous) fits. Zhang gave no specific method, only "sequence matters; exterior release and interior attack differ." One drug cannot treat both meridians indiscriminately. Sequence depends on priority. For transmitted pathogens, treat exterior then interior; for direct pathogens, treat interior first. In warm disease, interior is heavier; in Two-Feelings, prioritize the dominant aspect. If Yin fluid is exhausted with false Yang flare-up, treating Taiyang causes instant Yang collapse; must first warm meridian Yang and tonify Yin. If emaciated with internal heat scorching Kidney Water showing black tongue/nose coal, treating Taiyang causes instant Yin collapse; must urgently purge to save water, then treat Taiyang. If Taiyang pathogen is acute with severe fever/chills/headache/stiffness/panting, warming causes macules/delirium, purging causes chest binding/delirium; must first release Taiyang with Guizhi method, then warm or purge Yin pathogens. This aligns with Taiyang exterior and Shaoyin sweating principles. Can sequence be predetermined? Yes. But Shang Han interior attack is pure purgation; Warm Disease Two-Feelings often has Yang collapse signs, requiring combined warming and purging. This adapts to pathology. ○ Marvelous! Zhang detailed essence-deficient syndromes and treatments but didn't highlight them explicitly. Take Guizhi Tang: intended for Taiyang wind-strike, yet contains sweating, purging, harmonizing, and warming methods. Warming methods are detailed (adding Fuzi, Renshen, Baizhu, Ganjiang, Rougui, Fuling, etc.), unusual for pure exterior syndromes. It serves to warm meridians and dispel pathogens, similar to Mahuang Fuzi Xixin Tang. For essence-deficient cases with mixed exterior-interior pathogens and deficient Yin-Yang, applying these methods works well. (Yu Jiayan)

He Suhe said: After Start of Spring, without extreme cold or ice/snow, if someone has high fever, it belongs to Spring Yang expanding outward, transforming winter-hidden cold into warm disease. The word "transform" is excellent. Yu Jiayan disagreed, but I agree. Hidden cold stagnates and transforms into heat naturally. Shang Han is cold, briefly invading Ying, quickly becoming high heat; delayed heat is natural. Saying "transform" teaches the world. Why "Warm" and not "Heat"? Because Spring commands warmth.