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Chapter 54 states: Zang organ diseases are difficult to treat, while Fu organ diseases are easy to treat. What does this mean?

The response is: The reason Zang diseases are difficult to treat is that the pathogenic Qi transmits to the organ it overcomes (Chuan Qi Suo Sheng); the reason Fu diseases are easy to treat is that the pathogenic Qi transmits to the organ it generates (Chuan Qi Zi). This follows the same principle as Seven Transmissions (Qi Zhuan) and Inter-Zang transmissions (Jian Zang).

Zang diseases are difficult to treat because they transmit to the organ they overcome; if they transmit to the organ they generate, they are also easy to treat. Fu diseases are easy to treat because they transmit to the organ they generate; if they transmit to the organ they overcome, they are also difficult to treat. Generally, this distinction in difficulty arises because Zang diseases are deep-seated, whereas Fu diseases are superficial. However, one should not be rigidly bound by this, hence it is said that it follows the same rules as Seven Transmissions and Inter-Zang transmissions.

Chapter 55 states: Diseases can be classified into Accumulation (Ji) and Gathering (Ju). How can they be distinguished?

The response is: Accumulation belongs to Yin Qi, while Gathering belongs to Yang Qi. Therefore, Yin is sunken and latent, while Yang is floating and active. Where Qi accumulates, it is called Accumulation; where Qi gathers, it is called Gathering. Thus, Accumulations arise from the Five Zang organs, while Gatherings are formed by the Six Fu organs. Accumulation is caused by Yin Qi; its onset has a fixed location, the pain remains within that area, moving up and down with definite beginnings and endings, and extending left and right to specific limits. Gathering is caused by Yang Qi; its onset has no root, it moves up and down without staying in any place, and the pain has no fixed location, which is why it is called Gathering. Therefore, these characteristics allow us to distinguish between Accumulation and Gathering.

Accumulations are generated by the Five Zang organs. Since Zang organs belong to Yin, Yin pathogenic factors gradually accumulate to form Accumulation, hence the name. Yin governs stillness, so the accumulation sinks and remains fixed in its place. This is a disease formed by the knotting of Yin Qi in the Zang organs, sometimes accompanied by Blood stasis. Therefore, in the areas above, below, to the left, and to the right of the lesion, the size and shape of the mass can be palpated and traced. Gatherings are generated by the Six Fu organs. Since Fu organs belong to Yang, Yang pathogenic factors gradually gather to form Gathering, hence the name. Yang governs movement, so the gathering floats and lacks a fixed location. This is purely a stagnation of Qi that does not disperse. Therefore, its location is undefined, its shape is indeterminate, and it flows irregularly in all directions. This explains the distinction between Yin Accumulation and Yang Gathering. This chapter likely corresponds to Chapter 52, possibly due to textual displacement (Cuo Jian).

Chapter 56 states: Do the five Accumulations have specific names? On which months and days do they occur?

The response is: The Accumulation of the Liver is named Fei Qi (Fat Qi / Luxuriant Qi). It is located under the left hypochondrium, resembling an inverted cup, with distinct head and foot structures. If untreated for a long time, it causes coughing, counterflow Qi, and malaria, persisting for years. It occurs on Wu and Ji days during the late summer (Ji Xia). Why is this so? When Lung disease transmits to the Liver, the Liver should transmit to the Spleen. However, the Spleen is prosperous in late summer, and the ruling organ does not accept pathogenic invasion. The Liver then attempts to transmit back to the Lung, but the Lung refuses to accept it. Consequently, the pathogen remains and knots to form an Accumulation. Thus, Fei Qi is acquired on Wu and Ji days in late summer.

"Accumulation" implies storage, referring to the stagnation and accumulation of Qi and Blood. It also results from the transmission of the Five Pathogens (Wu Xie). "Fei Qi" describes the luxuriance of the pathogenic Qi. The left hypochondrium is the region where Liver Wood ascends. The shape resembling an inverted cup, broad at the base and narrow at the top, symbolizes the nature of Liver Wood. The "head and foot" represent one root branching into two ends, further emphasizing the tangible form of the wood element. Coughing and counterflow Qi occur because the collateral channel of the Foot Jueyin Liver meridian passes through the diaphragm and connects to the Lung. Liver Qi rushes upward to the Lung, counteracting the Metal it normally controls. Malaria here refers to intermittent fever occurring every other day. All five Zang organs can manifest malaria; when in the Liver, it is called Wind Malaria. Malaria often involves the Shaoyang channel, and Jueyin and Shaoyang are exterior-interior pairs. The pathogen penetrates deeply, causing chronic illness. The etiology is Lung transmitting to Liver (transmitting to what it overcomes). The Liver should transmit to the Spleen, but Spleen Earth is strong in late summer and rejects the pathogen. The pathogen tries to return to the Lung, but Liver Wood cannot overcome Lung Metal, so the Lung refuses it. With no path to travel, the pathogen knots in the Liver. Late summer corresponds to the Wei Earth month, and Wu/Ji correspond to Earth days. During times of extreme Spleen Earth prosperity, Liver Wood cannot control it, leading to the formation of this Accumulation on those specific months and days. This demonstrates that deficiency invites pathogens, while prosperity repels them. Modern practitioners who only use attacking methods for Accumulations greatly deviate from the classic principles. This chapter lists the names and forms of the five Accumulations but omits Gatherings because Gatherings lack fixed locations and thus have no fixed names or forms.

The Accumulation of the Heart is named Fu Liang (Hidden Beam). It starts above the umbilicus, is as thick as an arm, and extends up to the epigastrium. If untreated for a long time, it causes mental restlessness. It occurs on Geng and Xin days in autumn. Why? Kidney disease transmits to the Heart. The Heart should transmit to the Lung. The Lung is prosperous in autumn and rejects the pathogen. The Heart tries to transmit back to the Kidney, but the Kidney refuses. The pathogen knots in the Heart, forming the Accumulation. Thus, Fu Liang is acquired on Geng and Xin days in autumn.

"Fuliang" means lying hidden and motionless, stretching horizontally like a beam. The area from the umbilicus to the epigastrium belongs to the Heart. Mental restlessness is caused by Fire stagnation. The etiology is Kidney transmitting to Heart (transmitting to what it overcomes). The Heart should transmit to the Lung, but Lung Metal is strong in autumn and rejects the pathogen. The pathogen tries to return to the Kidney, but Heart Fire cannot overcome Kidney Water, so the Kidney refuses. The pathogen knots in the Heart. Autumn corresponds to Shen/You Metal months, and Geng/Xin are Metal days. During times of extreme Metal prosperity, Heart Fire cannot control it, leading to this Accumulation.

Note: *Ling Shu: Pathogenic Factors, Zang-Fu Organs, and Disease Manifestations* states: A slightly slow Heart pulse indicates Fu Liang, located below the heart, moving up and down, with occasional hemoptysis. *Ling Shu: Muscle Sinews* states: Disease of the Hand Shaoyin sinew involves internal tension, with the Heart bearing the burden of Fu Liang, extending down to the elbow network. If Fu Liang develops with pus and blood expectoration, it is incurable. Both chapters describe excess-type Accumulations of the Heart. Although symptoms are not fully detailed, the principle is consistent. In contrast, *Su Wen: Abdominal Discussion* describes a different condition named Fu Liang: rooted in the lower abdomen, containing large amounts of pus and blood, located outside the intestines and stomach. It is untreatable; pressing it can cause death. Lower lesions involve Yin, leading to purulent stools; upper lesions press on the stomach, causing internal abscesses in the diaphragm. This is a chronic, difficult-to-treat condition. Located above the umbilicus is adverse; below is favorable. This condition involves Yang pathogens accumulating in the Blood aspect, disrupting Qi transformation, rather than Yin Qi knotting in the Zang. Located in the Taichong region of the lower abdomen, Yang toxicity gathers into pus and blood. Downward flow damages Yin, causing purulent stools; upward flow presses the stomach/diaphragm, causing internal abscesses. This describes Yang-toxicity-induced Fu Liang. Another passage states: Swelling of thighs and legs with periumbilical pain is named Fu Liang, rooted in Wind. Qi overflows into the Large Intestine and attaches to the Huang (Tri-Jiao membrane). The source of Huang is below the umbilicus, causing periumbilical pain. Manipulation leads to urinary retention. This describes Wind-toxicity-induced Fu Liang. Though named similarly, the syndromes and treatments differ. Failure to distinguish wind-rooted Fu Liang invites criticism.

The Accumulation of the Spleen is named Pi Qi (Obstruction Qi). It is located in the epigastrium, covering an area as large as a plate. If untreated for a long time, it causes weakness of the four limbs, jaundice, and failure of food to nourish the muscles. It occurs on Ren and Gui days in winter. Why? Liver disease transmits to the Spleen. The Spleen should transmit to the Kidney. The Kidney is prosperous in winter and rejects the pathogen. The Spleen tries to transmit back to the Liver, but the Liver refuses. The pathogen knots in the Spleen, forming the Accumulation. Thus, Pi Qi is acquired on Ren and Gui days in winter.

"Pi" relates to "Pi" (Stagnation/Blockage), symbolizing Heaven and Earth not interacting. The Spleen resides in the center, symbolizing Earth, so the accumulation is in the epigastrium. The Spleen governs the limbs; pathogenic congestion prevents Zheng Qi circulation, causing limb weakness. Dampness stagnation in the Spleen manifests as yellowing of skin, nails, and eyes (Jaundice). While jaundice has many causes, it always involves the Spleen and Dampness. The Spleen governs muscles; with Spleen Accumulation, fluids are not distributed, so food fails to nourish muscles. Etiologically, Liver transmits to Spleen (overcoming). Spleen should transmit to Kidney, but Kidney Water is strong in winter and rejects the pathogen. The pathogen tries to return to the Liver, but Spleen Earth cannot overcome Liver Wood, so the Liver refuses. Winter corresponds to Hai/Zi Water months, and Ren/Gui are Water days. During Water prosperity, Spleen Earth cannot control it, leading to this Accumulation.

The Accumulation of the Lung is named Xi Ben (Rushing Breath). It is located under the right hypochondrium, covering an area as large as a cup. If untreated for a long time, it causes chills and fever, wheezing and coughing, and Lung obstruction. It occurs on Jia and Yi days in spring. Why? Heart disease transmits to the Lung. The Lung should transmit to the Liver. The Liver is prosperous in spring and rejects the pathogen. The Lung tries to transmit back to the Heart, but the Heart refuses. The pathogen knots in the Lung, forming the Accumulation. Thus, Xi Ben is acquired on Jia and Yi days in spring.

"Ben" is anciently synonymous with "Ben" (Run/Flee). Xi Ben refers to rushing breath. The right hypochondrium is where Lung Metal descends. Chills and fever relate to the Lung governing skin and hair. "Yong" is anciently synonymous with "Yong" (Abscess). Severe Lung disease causes wheezing/coughing and may develop into Lung Abscess. *Su Wen: Extraordinary Oddities* states: Lung obstruction presents with wheezing and bilateral fullness. Etiologically, Heart transmits to Lung (overcoming). Lung should transmit to Liver, but Liver Wood is strong in spring and rejects the pathogen. The pathogen tries to return to the Heart, but Lung Metal cannot overcome Heart Fire, so the Heart refuses. Spring corresponds to Yin/Mao Wood months, and Jia/Yi are Wood days. During Wood prosperity, Lung Metal cannot control it, leading to this Accumulation.

Note: *Ling Shu: Muscle Sinews* states: Disease of the Pericardium sinew causes spasms along its pathway, extending forward to chest pain and Xi Ben. The Pericardium sinew traverses the hypochondrium and abdomen, disperses in the chest, and knots at the cardia of the stomach. Spasms occur at the sinew junctions, with pain radiating to the chest and knotting at the cardia, hence "Xi Ben." Also, disease of the Hand Taiyin sinew causes spasms; severe pain leads to Xi Ben, hypochondriac stiffness, and hemoptysis. The Hand Taiyin sinew disperses through the cardia. Spasms occur along the pathway; severe pain causes Xi Ben and hemoptysis due to Qi rebellion driving Blood. *Su Wen: Differentiations of Yin and Yang* states: Diseases of the Two Yang (Yangming Stomach and Large Intestine) originating in Heart and Spleen involve unspoken grievances and amenorrhea in women. Progression leads to Wind Wasting or Xi Ben, which is incurable. The Two Yang refer to Foot Yangming Stomach and Hand Yangming Large Intestine. Originating in Heart/Spleen implies initial emotional constraint leading to Qi stagnation and Fire, damaging Heart Ying (Nutrient) Qi. Damaged Ying Qi fails to support the Spleen, impairing transportation. Food intake decreases, Stomach Yin declines. Essence and Blood rely on postnatal Gu Qi. As Gu Qi depletes and Internal Fire burns, men suffer low essence, women amenorrhea, and Blood dries up. Large Intestine function fails, Stomach Dryness generates Fire, Fire generates Wind, wasting muscles. Water/Essence exhausts, Metal loses its source, Kidney Qi fails to grasp, rebelling into the Lung, causing fatal wheezing. These three scenarios seem similar but are distinct. *Su Wen: Rare Diseases* states: Hypochondriac fullness with Qi rebellion lasting years is named Xi Ji (Accumulated Breath). It does not affect eating. Moxibustion/acupuncture are contraindicated; treatment requires Daoyin (qigong/exercise) combined with herbs, as herbs alone are insufficient. This aligns with the current chapter.

The Accumulation of the Kidney is named Ben Tun (Rushing Pig). It originates in the lower abdomen, extends to the epigastrium, resembles a running pig, and moves up and down without fixed timing. If untreated for a long time, it causes wheezing/reversal, bone萎 (weakness), and shortness of breath. It occurs on Bing and Ding days in summer. Why? Spleen disease transmits to the Kidney. The Kidney should transmit to the Heart. The Heart is prosperous in summer and rejects the pathogen. The Kidney tries to transmit back to the Spleen, but the Spleen refuses. The pathogen knots in the Kidney, forming the Accumulation. Thus, Ben Tun is acquired on Bing and Ding days in summer. This is the key method for the five Accumulations.

"Ben Tun" resembles a pig's frantic running due to its restless nature. Originating in the lower abdomen (Kidney region) and rising to the epigastrium without fixed timing reflects Kidney Qi rebellion. Wheezing/reversal occurs because the branch of the Foot Shaoyin Kidney meridian emerges from the Lung, connects to the Heart, and enters the chest; Kidney Qi rushes upward. The Kidney governs bones, hence bone weakness. The Kidney fails to grasp Qi, hence shortness of breath. Etiologically, Spleen transmits to Kidney (overcoming). Kidney should transmit to Heart, but Heart Fire is strong in summer and rejects the pathogen. The pathogen tries to return to the Spleen, but Kidney Water cannot overcome Spleen Earth, so the Spleen refuses. Summer corresponds to Si/Wu Fire months, and Bing/Ding are Fire days. During Fire prosperity, Kidney Water cannot control it, leading to this Accumulation.

Note: *Shang Han Lun: Taiyang Chapter* states: After sweating, palpitations below the umbilicus indicate impending Ben Tun. Sweating depleted Heart Fluid, causing Qi to move upward. Treat with Fuling Guizhi Gancao Dazao Tang to protect Heart Qi and control Water. Also: After sweating and using burning needles, cold entering the needle site causes red nodules and Ben Tun, with Qi rushing from the lower abdomen to the heart. Sweating damaged Blood; burning needles further injured the vessels. Vessel injury weakens Heart Qi; Cold insults Heart Fire, causing red nodules. Heart deficiency allows Floating Qi, enabling Kidney Qi to rush upward. Moxa each nodule once to unblock meridians, then give Guizhi Jia Gui Tang to dispel Cold and tonify Heart Qi. These sections discuss mismanaged exogenous diseases, distinct from chronic Accumulations. *Jin Gui Yao Lue* states: Ben Tun, pus expectoration, fright, and Fire Pathogen all stem from sudden fright. Gallbladder/Liver pathology from fright affects Water (Mother), causing upward rushing. Other conditions are fright-related but not Ben Tun. Also: Ben Tun rushes from lower abdomen to throat, feeling fatal before subsiding, all from fright/fear. Fright injures Heart, Fear injures Kidney. Deficiency of Heart Fire/Kidney Water disrupts interaction, allowing Kidney deficient pathogen to rush upward. Treatment: Ben Tun Qi rushing to chest/abdomen with alternating chills/fever is treated with Bentun Tang. Comparing *Jin Gui* passages with this chapter, both link to fright but differ in organ involvement (Gallbladder/Liver vs. Heart/Kidney). Furthermore, exogenous vs. Accumulation etiologies differ. Understanding disease origin and transmission is crucial, not just for Ben Tun.