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Shan (Hernia): Wind shan can occur in all six meridians. Shan refers to a condition where bi-occluded qi fails to circulate and gathers to form a mass. The pulse must be slippery, and the symptoms must involve wind, because shan is characterized by its mobility and gathering; mobility implies the involvement of wind, and gathering constitutes shan, hence the slippery pulse. However, *Neijing* specifically points out that Ren Mai (Conception Vessel) disease manifests as seven types of internal hernias in men and leukorrhea with zhaj masses (abdominal masses) in women. Later discussions on shan are based on this, yet shan is not uniform. There is huxian (fox hernia), named for its irregular entry and exit; there is xixian (scrotal hernia), named for its hard swelling and insensitivity; there is chongshan (rushing hernia), named for pain rushing from the lower abdomen to the heart; there is juehsian (reversal hernia), caused by accumulated qi in the abdomen reversing upwards; and there is jiahsian (mass hernia), characterized by heat and pain in the lower abdomen with discharge of white fluid, also called gu disease. All these shan syndromes are located around Zhongji (CV3), where the lower abdomen serves as the convergence point for all yin meridians, connecting upwards to Guanyuan (CV4). None originate without Ren Mai as the root. The area between the anterior genitalia and the lower abdomen is where the Foot Three Yin, Foot Yangming, Ren, Chong, and Du meridians converge. Thus, shan syndromes may also arise from Shaoyang excess fire damaging tendons and triggering Liver wind shan, where Shaoyang ministerial fire invades the yin, damages tendons, stirs Liver wood wind, and gathers into Liver shan. Additionally, Taiyang and Kidney meridians combining with wind-cold damage yin, gathering in the Kidney to form Kidney wind shan. Furthermore, Jueyin excess causes Yin bi (obstruction); if the pulse is slippery, it results in fox hernia, as Jueyin resides in the lower jiao and governs all tendons; when its qi is stagnant and fails to ascend, Yin bi occurs, and a slippery pulse indicates fox wind shan. In summary, although these syndromes have diverse origins, they manifest primarily through Ren Mai because Ren Mai gathers all yin meridians. These syndromes stem from heat, cold, deficiency, or labor, but all invade yin and damage tendons. Thus, the disease lies in yin, the injury is in tendons, movement resembles wind, and accumulation resembles mountains, hence the name "shan." Later generations arbitrarily named shan without understanding its etiology; upon careful investigation, treatment methods become clear.

Fuliang (Hidden Beam): *Neijing* describes two types of Fuliang, both located at the Yuan of Huang (the origin of the epigastrium/omental region), outside the intestines and stomach, connecting the Three Yin meridians with Chong and Dai vessels. One type encases large amounts of pus and blood; the other is an accumulation formed by cold reversal. They are called "Fu" (hidden) because they lie low, and "Liang" (beam) because they are hard and rigid like a beam, and also because they lie horizontally across Tianshu (ST25). The type enclosing pus and blood has roots extending up, down, left, and right in the lower abdomen. After long-term accumulation, the root knots deepen. Downward progression leads to purulent bloody discharge; upward progression compresses the stomach. If located above the navel, it gradually presses against the Heart and Lungs, constituting a "Ni" (reverse/adverse) condition. Only those below the navel are relatively mild, constituting a "Cong" (following/compliant) condition. This is difficult to treat; reckless attacking to deplete Stomach qi will only cause harm without benefit. Another syndrome presents with swelling of the body and thighs and pain circling the navel. This also belongs to Chong Mai pathology, knotting at the navel and waist, located at the Yuan of Huang, also known as Lower Qihai. Its root is wind, formed by the combination of cold qi and reversal qi. The formation of this accumulation obstructs the cold water qi of the Kidneys, preventing circulation, causing body and thigh swelling and periumbilical pain. This is an accumulation of yin and yang qi; one should not recklessly move or purge. Reckless purging further damages yin; damaged yin leads to greater qi stagnation and impaired water pathways.

Kuang (Mania): Mania begins with sadness, forgetfulness, irritability, and fear. Patients sleep little, feel no hunger, and subsequently become arrogant, considering themselves wise, virtuous, and noble. They curse incessantly day and night, enjoy singing and music, act wildly without cessation, eat excessively, and hallucinate ghosts and spirits. This results from severe fright, grief, or excessive joy causing spirit loss. External pathogenic factors affecting the Yangming Meridian can also induce mania, characterized by climbing roofs, shouting, discarding clothes, running, and cursing relatives and strangers alike. This is due to pathogenic factors merging with yang, termed "Double Yang leads to mania." However, the former is a Heart disorder, while the latter is a heat disease. Yangming is the residence of the Heart Monarch; heat merging here inevitably affects the spirit, causing spirit loss. Additionally, disharmony between Heart and Kidney, with interaction of Two Yin and Two Yang, can lead to Kidney water coldness and rebellious Dragon Fire rising to merge with Yangming heat, confusing the spirit and causing epilepsy or mania, with cursing and wild behavior. This is described as Kidney essence failing to guard, unable to control the interior, allowing Heart fire to burn itself. There is also "Anger-induced Mania," where sudden obstruction of yang qi makes it difficult to resolve, leading to anger and mania, also called Yang Jue (Reversal). Treatment involves drinking decoction made from Sheng Tie Luo (Fallen Iron), and restricting food intake cures the disease, as restricting food prevents yang from growing, and fallen iron descends qi.

Dian (Epilepsy/Spirit Disorder): Early Dian syndrome presents with unhappiness, heavy head pain, staring red eyes, crying, shouting, panting, palpitations, opisthotonos, and fullness of bones, tendons, and vessels. Bone Dian involves fullness of teeth and acupoints/muscles, protruding bones, sweating, and vexation. Tendon Dian involves curling and spasms. Pulse Dian involves sudden collapse, distended yet flaccid limb pulses, and full pulses. Vomiting much phlegm and downward leakage of qi indicate untreatable conditions. Dian resembles Xian (epileptic convulsion) but differs in lacking intermittent remission. Liver disease is predominant. Unhappiness indicates Liver overacting on Heart; heavy head pain indicates Liver qi rebelling upward; staring indicates tension in Liver eye connections; red eyes indicate fire; crying/shouting/panting/palpitations indicate Liver fullness overacting on Heart, confusing spirit; opisthotonos indicates tendon tension. Fullness of bone, tendon, and vessel parallels Xian but lacks intervals. Large, slippery pulses indicate self-resolution after a long time; small, firm, rapid pulses indicate death and untreatability. Yang fighting Yin with slippery pulse suggests yin still prevails, hence recovery. Small, firm, rapid pulse reveals true Liver organ pulse, hence untreatable. Excessive vomiting, phlegm, and downward qi leakage indicate reversed Stomach qi, relaxed Spleen qi, and unguarded Kidney gate; lack of Stomach qi leads to death. Deficiency is treatable; excess is fatal. Deficiency means slow, non-firm pulse; excess means wiry, rapid pulse with lost vitality.

Xian (Epileptic Convulsion): Examining *Neijing*, "Two Yin urgency" causes Xian Jue (epileptic reversal). Full-large Heart pulse causes Xian convulsions and tendon cramps. Small-rapid Liver pulse causes Xian convulsions and tendon cramps. Foot Shaoyin tendon disease causes Xian convulsions and spasm. The pathology lies in Kidney qi reversal, injuring yin and tendons. Kidney governs Shaoyin and pivot; Shaoyin reversal causes pivot failure, blocking qi in meridians ascending. Shaoyin meridian connects to the tongue base; blockage narrows the throat, producing sounds like sheep or pigs. Symptoms stop after a period because qi reverses back, distinguishing it from Dian. Full-large Heart pulse with Xian convulsion results from Kidney reversal depressing Heart fire, causing fullness. Reversal affecting Liver occurs due to prior Liver yin deficiency attacked by Kidney qi, resulting in small-rapid Liver pulse and convulsions. Liver yin deficiency makes pulse small; Kidney reversal makes it rapid. Xian always accompanies convulsions. "Two Yin urgency causes Xian Jue" emphasizes Shaoyin reversal preceding Xian. Yang Wei Mai from Shaoyin to Taiyang, when active, causes muscle bi and lower body insensitivity, or sudden collapse, bleating, aphasia. Yin Wei Mai from Shaoyang to Jueyin, when active, causes epileptic collapse, bleating, aphasia. Yang Wei connects all yang meridians via Shaoyin (yin root of yang); Shaoyin yin evil reaching yang blocks yang intersections, causing bi/insensitivity/collapse/aphasia. Aphasia occurs when Shaoyin qi does not reach. Yin Wei connects yang to drive yin; activity in Shaoyang drives yang; Shaoyang decline allows yin evil to block yin intersections, drawing sinews, causing collapse/bleating/aphasia. Though not explicitly mentioning Shaoyin, Jueyin formulas reflect Shaoyin pivot failure. Understanding this clarifies various Xian syndromes.

Dan Jaundice: Jaundice is named for yellow eyes, feeling hungry after eating, dark yellow urine, and desire to rest quietly. *Lun Ji Zhen Chi* states: bodily illness with slight yellow complexion, yellow tooth tartar, and yellow nails indicate Dan Jaundice. There are three types: Heat in heart and soles indicates Wine Jaundice; hunger after eating and good digestion indicate Stomach Jaundice (Grain Jaundice). Grain Jaundice with small, choppy pulse and anorexia indicates middle jiao cold-damp. Female Labor Jaundice presents with black forehead, slight sweating, hot palms/soles, evening fever, bladder urgency, and free urination. While symptoms vary, all share yellow eyes/body due to central jiao stasis-heat, external bi, internal heat, and dark urine. However, bladder urgency with free urination indicates yin/kidney damage, requiring distinct treatment separate from Wine or Grain Jaundice.

Xue Ku (Blood Depletion): *Neijing* cites Chest/Hypochondriac fullness, food intolerance, smelling foul odors, clear fluid discharge, hemoptysis, cold limbs, dizziness, and frequent bleeding from front/rear orifices as Blood Depletion. "Zhi Man" means fullness like being braced. Lung governs qi and smell of fishy; Liver governs blood and smell of game. Lung qi failing to calm Liver qi causes both to rebel upward, turbid qi failing to descend, clear qi failing to ascend, leading to smelling odors and vomiting clear fluid. Hemoptysis indicates blood leaving vessels. Cold limbs indicate qi failing to circulate. Dizziness indicates qi following excessive blood loss. Chaotic blood/qi causes irregular bleeding and amenorrhea. Kidney stores, Liver courses; this syndrome injures both Kidney and Liver. Long-term depletion exhausts Three Yin, progressing to blood depletion and amenorrhea. Men suffer essence depletion, classified as劳损 (labor damage). Similar to Xue Ge (blood separation/stagnation) in amenorrhea, but opposite: Ge is acute, painful, excess, responsive to unblocking; Ku is chronic, Chong/Ren internally exhausted, unblocking impossible. Treatment requires nourishing yin and tonifying qi to replenish blood.