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Since the publication of Wu Jutong's *Wenbing Tiaobian* (Treatise on Warm Diseases) and Wang Mengying's *Wenre Jingwei* (Compendium of Warm and Heat Diseases), physicians have come to understand that Shanghan (Cold Damage) is distinct from Wenre (Warm-Heat diseases). However, these works mostly discuss newly contracted warm and summerheat diseases, leaving the mechanisms of latent warm-heat diseases unelucidated. Herein, the etiology, symptoms, pulse patterns, and treatments of latent warm-heat diseases as described by past sages are detailed below.

The *Huangdi Neijing* (Yellow Emperor’s Inner Canon) states: "If one is injured by cold in winter, one will inevitably suffer from warm disease in spring." If the skin at the chi position is severely hot, and the pulse is vigorous and restless; or if the pulse is vigorous and slippery, it indicates that the pathogen is about to exit. In cases of warm disease, if sweating is followed immediately by recurrent fever, and the pulse remains rapid and restless without subsiding due to sweat, accompanied by delirium and inability to eat... this condition is named Yin-Yang Jiao (Intersection of Yin and Yang), which is fatal. Thus, if a patient with warm disease has extreme deficiency, they will die. The canon further states: "Injury by cold in winter leads to Danre (intense heat) in spring." In heat diseases, if the Taiyang (Greater Yang) pulse presents with redness on the cheekbones... and appears simultaneously with the Jueyin (Terminal Yin) pulse, death will occur within three days. If the Shaoyang (Lesser Yang) pulse presents with redness on the cheeks... and appears simultaneously with the Shaoyin (Lesser Yin) pulse, death will occur within three days. On the third day of heat disease, if the cunkou (radial) pulse is calm but the renying (carotid) pulse is restless, apply the fifty-nine acupuncture points of the Yang channels. On the seventh or eighth day, if the patient is panting and the pulse is wiry, urgent needling is required. On the seventh or eighth day, if the pulse is minute and small, the patient has hematuria and dry mouth, death will occur within half a day; if the pulse is intermittent (Dai), death will occur within one day. If heat disease has produced sweat but the pulse remains restless, with panting and recurrent fever, do not needle the skin; severe panting indicates death. On the seventh or eighth day, if the pulse is not restless, or if it is restless but not scattered and rapid, sweat may appear after three days; if no sweat appears after three days, death occurs on the fourth day; if no sweat has occurred, do not needle the couli (pores). If the patient with heat disease cannot localize pain, suffers from deafness and inability to control limbs, has a dry mouth, extreme Yang heat, yet significant Yin cold, the heat is in the bone marrow and is incurable. If heat disease has produced sweat but the pulse remains vigorous and restless, this represents the extreme of Yin pulses and is fatal. Those who sweat and have a calm pulse will survive. If the patient has heat disease with a vigorous and restless pulse but cannot sweat, this represents the extreme of Yang pulses and is fatal. A vigorous and restless pulse that becomes calm after sweating indicates survival. There are nine types of heat disease where needling is contraindicated: 1. No sweat, redness on the malar bones, and hiccups indicate death; 2. Diarrhea with severe abdominal fullness indicates death; 3. Unclear vision with persistent heat indicates death; 4. Fever and abdominal fullness in the elderly or infants indicate death; 5. Profuse sweating, vomiting, and bloody stool indicate death; 6. Ulceration of the tongue root with persistent heat indicates death; 7. Coughing with epistaxis, no sweat, or sweat failing to reach the feet indicates death; 8. Marrow heat indicates death; 9. Fever with spasms (Jing), characterized by opisthotonos, convulsions, and lockjaw, indicates death. These nine conditions are not to be needled. One should drain the heat to induce sweat and tonify the Yin to compensate for deficiency (He Lianchen notes: These two sentences are the general principle for treating warm-heat diseases). This is the discourse on warm-heat by Xuanyuan (Yellow Emperor) and Qibo.

Qin Yueren (Bian Que) in the *Nan Jing* (Classic of Difficult Issues) states: Wet-warmth, warm disease, and heat disease... each causes different suffering. The pulse of wet-warmth is soggy and weak in the Yang positions, and small and rapid in the Yin positions. The pulse of warm disease flows through various meridians, making it difficult to identify the affected meridian; treatment should follow the location of the meridian involved. The pulse of heat disease is floating in both Yin and Yang positions; superficially it is slippery, deeply it is scattered and choppy. It also states: ...For internal heat disease, select the Hui-Meeting (Convergence) acupoints (He Lianchen notes: The Hui-Meeting of the Fu organs is Zhongwan (CV12), Zang organs is Zhangmen (LR13), tendons is Yanglingquan (GB34), marrow is Fengfu (GV16), blood is Geshu (BL17), bones is Dazhu (BL11), vessels is Taiyuan (LU9), and Qi is Danzhong (CV17); these are the Eight Hui-Meeting points, used by practitioners of that era for needling in heat disease). This is Bian Que's discourse on warm-heat.

Zhang Zhongjing's *Shanghan Lun* (Treatise on Cold Damage) (Zhang Shiweng comments: Examples of warm and heat diseases by Zhongjing have traditionally been mixed into the Six Meridians framework of Shanghan, leading later generations to mistakenly use Huangqin Tang or Baihu Tang to treat Shanghan, or mislabel Huangqin/Baihu patterns as Shanghan. This confusion has obscured knowledge for millennia. Now, these warm-heat clauses are extracted into this section so students may recognize that *Shanghan Lun* contains specific treatments for warm-heat syndromes.) states: In Taiyang disease, if there is fever, thirst, and aversion to cold is absent, it is called Warm Disease. If, after sweating, the body becomes burning hot, it is named Wind-Warmth. In Wind-Warmth, the pulse is floating in both Yin and Yang positions, there is spontaneous sweating, heaviness of the body, excessive sleepiness, snoring breath, and difficulty speaking. If purgatives are incorrectly used, there will be urinary difficulty, fixed gaze, and incontinence; if fire therapy is incorrectly applied, mild cases result in yellowish discoloration, while severe cases resemble epilepsy with convulsions; if moxibustion or firing needles are used, one error may prolong the illness, but a second error will hasten death. In combined Taiyang and Shaoyang disease with spontaneous diarrhea, administer Huangqin Tang; if vomiting is present, Huangqin Jie Banxia Shengjiang Tang is indicated. In Yangming disease, the pulse is floating and tight, with dry throat, bitter taste, abdominal fullness, panting, fever, sweating, absence of aversion to cold, and preference for heat, along with body heaviness. If sweating is induced, restlessness, mental confusion, and delirium may occur; if firing needles are added, fearfulness, irritability, and insomnia result; if purgatives are used, the stomach becomes empty, allowing hostile qi to disturb the diaphragm, causing mental agitation and coating on the tongue, treated with Zhizi Chi Tang (He Lianchen notes: Lu’s commentary suggests the phrase regarding mental agitation applies prior to sweating, purging, or warming needles). If the pulse is floating with fever, thirst for water, and urinary difficulty, Zhu Ling Tang is indicated. In Yangming disease, if there is profuse sweating and thirst, Zhu Ling Tang is contraindicated because profuse sweating dries the stomach, and Zhu Ling Tang would further deplete fluids via urination. In combined Three-Yang disease, the pulse is large and floating at the guan position, with somnolence and sweating upon closing the eyes. In another presentation of combined Three-Yang disease, there is abdominal fullness, body heaviness, difficulty turning over, insensitivity of the mouth, greasy face, delirium, and urinary incontinence. If sweating is induced, delirium worsens; if purged, sweat appears only on the forehead with cold extremities; if there is spontaneous sweating, Baihu Tang is indicated (He Lianchen notes: Lu’s commentary suggests "Baihu Tang is indicated" applies prior to sweating or purging). In Shanghan, if the pulse is floating and slippery, indicating exterior cold and interior heat, Baihu Tang is indicated. In Shanghan, if the pulse is slippery with cold extremities, it indicates interior heat, treated with Baihu Tang. In Shanghan, if the pulse is floating with fever and no sweat, and the exterior syndrome is unresolved, Baihu Tang is contraindicated; if there is thirst for water and no exterior syndrome, Baihu Jia Renshen Tang is indicated. In Shanghan, if there is no high fever but dry mouth/thirst, irritability, and slight aversion to cold on the back, Baihu Jia Renshen Tang is indicated. In Shanghan, if after emesis or purgation, the disease persists for seven to eight days with heat結结 in the interior, presenting with exterior-interior heat, occasional aversion to wind, thirst, dry tongue, agitation, and desire to drink several liters of water, Baihu Jia Renshen Tang is indicated. After taking Guizhi Tang results in profuse sweating, if severe agitation and thirst persist with a洪大 (surging-large) pulse, Baihu Jia Renshen Tang is indicated (These three examples illustrate warm-heat emerging from the Three Yang). The Master says: Latent Qi disease is diagnosed by intuition. Within this month, if latent Qi is suspected, examine the pulse. If latent Qi exists, a weak pulse suggests sore throat resembling injury, but not Hou Bi (sore throat obstruction); the patient reports true throat pain, yet now also has diarrhea. In Shaoyin disease lasting two to three days with sore throat, Gancao Tang may be given; if ineffective, Jiegeng Tang is used. In Shaoyin disease with diarrhea, sore throat, chest fullness, and irritability, Zhufu Tang is indicated. In Shaoyin disease lasting more than two to three days, with irritability and inability to sleep, Huanglian Ejiao Tang is indicated. In Shaoyin disease with diarrhea for six to seven days, cough, vomiting, thirst, irritability, and insomnia, Zhu Ling Tang is indicated. In Shaoyin disease lasting two to three days, with dry mouth and throat, urgent purgation is required using Dachengqi Tang (These examples illustrate warm-heat emerging from Shaoyin) (He Lianchen notes: Zhang Shiweng says: Warm-heat moves from interior to exterior, so combined Three-Yang disease is most common. Emerging from Three Yang is easier to treat; emerging from Three Yin is difficult. However, emergence from Three Yin must have a cause, such as spleen injury from cold wine, liver injury from anger, or kidney injury from sexual excess, all damaging Yuan Qi and allowing latent pathogens to emerge. Using sweet-warm tonification would exacerbate the pathogen; using bitter-cold harsh purgation would destroy Yuan Qi. Even if Zhang Zhongjing were alive, he might struggle. ) For patients with chronic dampness, if only the head sweats, the back is stiff, and they desire covering and warmth near fire, premature purgation leads to hiccups, chest fullness, and urinary difficulty, with a tongue coating resembling moss. This is due to heat in the Dantian and cold in the chest. Thirst for drinking exists, but intake is impossible, causing dry mouth and irritability (He Lianchen notes: Heat in Dantian is latent pathogen; cold in chest is new contraction of cold-damp. This is a damp-bi syndrome biased toward heat, i.e., dampness suppressing latent heat. Head sweating is damp-heat steaming upward. Back stiffness and desire for warmth confirm new cold-damp. Combined with whole-body pain and joint discomfort, pure cold-damp mis-purged leads to fatal diarrhea. Because dampness has not transformed to dryness and heat has not solidified, premature purgation causes hiccups, chest fullness, and urinary difficulty. Zhang Shiweng advocates Huanglian Tang to harmonize upper/lower cold-heat, a good method for correcting wet-warmth errors. I follow his example, citing Zhang Zhongjing’s discussion on wet-warmth.) This is Zhang Zhongjing’s discourse on warm-heat.

Wang Shuhe’s *Shanghan Li* states: In deep winter cold... those who fall ill immediately are diagnosed with Shanghan. Those who do not fall ill immediately harbor cold toxicity in the skin and muscles, transforming into warm disease in spring and summerheat disease in summer. Summerheat disease is more intense than warm disease. Thus, laborers often suffer warm-heat diseases in spring and summer due to winter cold exposure, not due to epidemic qi. If additionally exposed to abnormal qi, transforming into other diseases (He Lianchen notes: Abnormal qi refers to seasonal qi encountered when latent pathogen is about to emerge, triggering its release), treat according to Lianggan (Double Contraction) principles. If both Yin and Yang pulses are full and heavy cold is contracted again, it transforms into Wen Nüe (Warm Malaria); if Yang pulse is floating-slippery and Yin pulse is soggy-weak with wind exposure, it transforms into Feng Wen (Wind Warmth); if Yang pulse is surging-numerous and Yin pulse is solid-large with warm exposure, it transforms into Wen Du (Warm Toxicity), the most severe form; if Yang pulse is soggy-weak and Yin pulse is wiry-tight with plague qi exposure, it transforms into Wen Yi (Warm Epidemic). This is Wang Shuhe’s discourse on warm-heat.

Chao Yuanfang’s *Zhubing Yuanhou Lun* (General Treatise on Pathogenesis and Symptoms of All Diseases) states: Laborers inevitably suffer warm-heat diseases in spring and summer due to winter exposure. Some contract cold toxicity in winter and manifest in spring warmth; some contract warm qi in winter without immediate manifestation, are suppressed by accumulated cold in spring preventing toxin release, and then manifest as Wen Du in summer upon heat exposure. All result from exterior-interior pathogen invasion, meridian damage, and Zang-Fu dysfunction. Symptoms are manifold; here are the essentials:
(1) Warm Disease Eruption Syndrome: After sweating, vomiting, or purging, if exterior signs persist and toxins remain undispersed, eruptions appear; Wen Du erupts on skin as macules and rashes resembling brocade patterns.
(2) Warm Disease Irritability Syndrome: Due to deficient Yin and abundant Yang, causing fever and irritability. If toxins reside in the Heart mansion,胸闷 (chest oppression) and nausea occur; if dry feces in the Stomach cause irritability, delirium and periumbilical pain result.
(3) Warm Disease Delirium Syndrome: Excess pathogen leads to solid extremities, enabling climbing and singing. Body heat causes discarding clothes and running; Yang excess causes cursing relatives indiscriminately, widespread high fever, delirium, and hallucinations.
(4) Warm Disease Cough Syndrome: Evil heat lodges in the Chest mansion, heating the Upper Jiao, causing thirst. Water stagnating below the heart ascends to the Lungs, inducing cough.
(5) Warm Disease Vomiting Syndrome: Heat in the Stomach combines with food qi, causing rebellious Qi and vomiting; or post-emesis/purgation, excessive water intake with cold-deficient Stomach causes vomiting.
(6) Warm Disease Hiccups Syndrome: Latent heat in Stomach causes chest fullness, rebellious Qi, and hiccups. Post-severe purgation, cold-deficient Stomach also causes hiccups.
(7) Warm Disease Thirst Syndrome: Heat enters the Kidneys; Kidneys dislike dryness. Severe heat dries Kidneys, causing intense thirst and drinking.
(8) Warm Disease Jaundice Syndrome: Unresolved sweating allows Wen Du toxins to stagnate in Stomach, obstructing urination, leading to jaundice with golden-yellow skin.
(9) Wen Du Sore Throat Syndrome: Heat toxins in Chest mansion attack the throat, causing pain or ulcers.
(10) Wen Du Eye Attack Syndrome: Liver opens to eyes. Liver Qi deficiency allows heat toxins to ascend, causing redness, pain, and potentially ulcers/pterygium.
(11) Warm Disease Epistaxis Syndrome: Lungs govern Qi and open to nose. Evil heat injures Heart, causing epistaxis (nosebleed).
(12) Warm Disease Hematemesis Syndrome: Deep heat toxins lodge in Five Zang, causing blood stasis accumulation and vomiting blood.
(13) Warm Disease Diarrhea Syndrome: Wind-heat enters intestines/stomach causing watery diarrhea; if toxic, yellow-red juice and pus-blood pass.
(14) Warm Disease Pus-Blood Diarrhea Syndrome: Severe heat toxins injure intestines/stomach, passing pus-blood like fish brains or rotten meat juice due to abundant Wen Du toxins.
(15) Warm Disease Constipation Syndrome: Accumulated heat in Spleen/Stomach, excessive sweating depleting fluids, drying Stomach and trapping heat internally, causing constipation.
(16) Warm Disease Urinary Retention Syndrome: Post-sweating fluid depletion causes heat knot in Bladder, leading to urinary retention.
(17) Warm Disease Genital Ulcer Syndrome: Heat attacks intestines/stomach; as toxins rise and grain qi declines, three parasites move, consuming Zang organs, causing genital ulcers or anal rot.
(18) Warm Disease Labor Relapse Syndrome: Upon recovery, fluids are not restored and Qi/Blood are weak. Early labor generates heat, which re-enters meridians, causing relapse. Care must be taken with combing hair or bathing.
(19) Warm Disease Dietary Relapse Syndrome: Upon recovery, Spleen/Stomach are weak and grain qi not restored. Eating dog, pig, mutton, intestines, blood, fatty fish, roasted fat, or greasy foods causes severe diarrhea, which is incurable. Avoid cakes, raw fruits, and hard-to-digest items to prevent stagnation, fullness, constipation, and recurrent fever.
(20) Warm Disease Yin-Yang Exchange Syndrome: Occurs when men or women engage in intercourse shortly after recovering from warm disease before full restoration. If a man transmits to a woman, it is Yang Exchange; if a woman transmits to a man, it is Yin Exchange. Symptoms include heat rushing to chest, heavy head, eye discharge, limb spasm, abdominal cramping, clenched hands/feet, leading to immediate death. Survivors suffer abdominal urgency, chest heat rush, heavy head, joint separation, weak meridians, depleted Qi/Blood/Marrow, lethargy, weakness, inability to move, requiring assistance, possibly dying after months.
(21) Warm Disease Sexual Activity Labor Relapse Syndrome: Illness resolved but Yin-Yang not harmonized. Early sexual activity causes genital swelling retracting into abdomen and abdominal pain.
(22) Warm Disease Post-Recovery Various Syndromes: Patients with pre-existing conditions (consumption, wind-cold, accumulations, cold colic) suffer Qi/Blood damage and Zang-Fu deficiency after sweating/vomiting/purging for warm disease, even if heat retreats, leading to various post-recovery illnesses.
(23) Heat Disease Irritability Syndrome: Yang exceeds Yin, heat alone prevails, blocking Zang and isolating Sanjiao, causing fever and irritability.
(24) Heat Disease Pox Syndrome: Exterior deficiency with interior excess. Strong heat causes pox. Widespread pox with red heads and white bases indicate mild toxicity; purple-black indicates severe toxicity. Resembling adzuki beans, hence named Dengdou Chuang.
(25) Heat Disease Macule-Pox Syndrome: Disease in exterior, whether unsweated or post-sweat/vomit/purge, if exterior signs persist and toxins remain, irritability, thirst, and inability to drink occur. Exterior deficiency/interior excess causes brocade-like macules.
(26) Heat Disease Hot Sore Syndrome: Exterior wind-damp combats heat, causing itchy, painful sores with pus. Severity fluctuates.
(27) Heat Disease Mouth Ulcer Syndrome: Heat in Spleen ascends to Upper Jiao, causing oral ulcers.
(28) Heat Disease Pharyngeal Ulcer Syndrome: Upper excess, lower deficiency, internal heat steams pharynx, causing ulcers.
(29) Heat Disease Constipation Syndrome: Profuse sweating depletes fluids, drying Stomach and trapping heat, causing constipation. Internal organ heat generation due to Sanjiao blockage and Spleen-Stomach disharmony also causes constipation.
(30) Heat Disease Urinary Retention Syndrome: Heat in Bladder flows to Small Intestine. Severe heat dries Spleen-Stomach and depletes fluids, causing retention.
(31) Heat Disease Diarrhea Syndrome: Heat attacks intestines/stomach. Stomach deficiency causes red-yellow discharge; toxicity causes pus-blood.
(32) Heat Disease Parasite Syndrome: Heat attacks intestines/stomach, declining grain qi, activating three parasites that consume Zang organs and lower body, causing anal rot.
(33) Heat Disease Eye Attack Syndrome: Liver opens to eyes. Deficiency allows heat toxins to ascend, causing ulcers, pterygium, and red-white membranes.
(34) Heat Disease Hand-Foot Attack Syndrome: Jing-River-Shu points of Zang-Fu emerge in fingers/toes. Toxins exit organs, travel meridians, attack extremities, causing swelling, redness, and pain.
(35) Heat Disease Vomiting Syndrome: Stomach heat disrupts food qi. New food combines with heat, disturbing Stomach Qi, causing vomiting. Post-emesis/purge organ deficiency also causes vomiting.
(36) Heat Disease Hiccups Syndrome: Latent heat in Stomach causes chest fullness, rebellious Qi, and hiccups. Post-purge excessive water intake with cold-deficient Stomach also causes hiccups.
(37) Heat Disease Dry Mouth Syndrome: Deficient heat in Five Zang and Spleen-Stomach disharmony deplete fluids, causing dry mouth.
(38) Heat Disease Epistaxis Syndrome: Caused by Heart heat injury. Lung opens to nose; evil heat combines with Qi/Blood, causing nosebleed.
(39) Heat Disease Labor Relapse Syndrome: Post-recovery fluid/Qi/Blood deficiency. Early labor generates heat, which re-enters meridians, causing relapse.
(40) Heat Disease Post-Illness Stagnation Syndrome: Post-recovery consumption of pork, sheep blood, fatty fish, or greasy foods causes severe diarrhea, incurable and fatal. Consumption of cakes, sweets, raw fruits, or hard foods with weak Stomach Qi causes indigestion, heat knot, and relapse, requiring purgation. This is Yuan Fang’s discourse on warm-heat.

Sun Simiao’s *Qianjin Fang* states: In Wind-Warmth, the pulse is floating in both Yin and Yang positions, sweating with body heaviness, panting breathing, numbness/unresponsiveness, silent somnolence. If purged, then