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The Fifty-Ninth Difficulty asks: How can one distinguish between Kuang (mania) and Dian (epilepsy/severe mental disorder)?

Answer: When Kuang disease first manifests, the patient sleeps little and feels no hunger, considers themselves virtuous, intelligent, noble, and arrogant; they laugh without reason, enjoy singing and music, and engage in reckless behavior without ceasing. This is Kuang disease. When Dian disease first manifests, the patient feels unhappy, stares fixedly, and suddenly collapses stiffly; their pulse is vigorous at all three positions (cun, guan, chi) across both yin and yang aspects. This is Dian disease.

Kuang disease belongs to Yang. At onset, Yang qi is excessive and fails to enter Yin, resulting in little sleep. Yang qi converges upward, causing lack of appetite. The attitudes of considering oneself virtuous, intelligent, and noble/arrogant are the mental characteristics of Kuang. Laughing without reason, enjoying singing, and reckless behavior are the physical manifestations of Kuang. Since the disease originates in Yang, and Yang is dynamic, its symptoms represent "excess" (Shi pattern). This corresponds to what was stated in the Twentieth Difficulty: "Double Yang leads to Kuang."

Dian disease belongs to Yin. At onset, the patient feels unhappy, which is the mental characteristic of Dian; staring fixedly and sudden stiff collapse are its physical manifestations. Since the disease originates in Yin, and Yin is static, its symptoms represent "deficiency" (Xu pattern). This corresponds to the Twentieth Difficulty: "Double Yin leads to Dian."

The phrase "pulse vigorous at all three positions across yin and yang" summarizes the above. It means that for Kuang originating in Yang, the Yang pulses at the three positions are vigorous; for Dian originating in Yin, the Yin pulses at the three positions are vigorous.

Commentary: In *Su Wen: Bing Neng Lun*, the Yellow Emperor asked: A person suffers from anger-induced mania. How does this disease arise? Qibo answered: It arises from Yang pathogens. The Emperor asked: How do Yang pathogens cause mania? Qibo said: Human Yang qi, due to sudden frustration and inability to resolve, leads to irritability; this disease is named Yang Jue (Yang Stupor). The Emperor asked: How do we know this? Qibo said: The Yangming meridian pulse is usually palpable; the Taiyang (Giant Yang) and Shaoyang meridians' pulses are usually not palpable. If the non-palpable ones become rapidly palpable, this is the sign. The Emperor asked: How to treat it? Qibo said: Restrict their food intake, and administer a drink made of Sheng Tie Luo (Iron Filings). Sheng Tie Luo acts swiftly to descend Qi. This section generally discusses that Kuang disease belongs to excessive Yang qi. Yang qi should ascend and diffuse; if suppressed, disease occurs. The pulse originates from Taiyang and Shaoyang; where these normally do not move but now move rapidly, and the Yangming pulse, which normally moves, becomes very vigorous, it indicates an impending Kuang attack. One should first restrict diet to weaken Stomach Fire and decline Qi, so Yang movement subsides and the disease heals. If severe, administer Tie Luo Yin to descend Qi, open stagnation, and calm Liver Wood and Heart Fire pathogens.

*Ling Shu: Dian Kuang Pian* states: Mania begins with sadness, forgetfulness, bitter anger, and fear, caused by worry and hunger. This indicates Yin deficiency leading to Yang excess, causing mania. It also states: Early Kuang features little sleep, no hunger, self-aggrandizement, arrogance, cursing day and night; this is Kuang due to Heart Qi Excess. Another form involves startled speech, laughter, singing, and reckless behavior, caused by great fright; this indicates Kidney disease transmitting to the Heart, causing Heart Qi Excess Kuang, as great fright injures the Kidney. Another form involves visual/auditory hallucinations and shouting, caused by Qi Deficiency; this is Kidney Qi deficiency leading to Heart Qi deficiency Kuang. Another form involves polyphagia, seeing spirits, laughing internally, caused by great joy; this indicates Joy injuring the Heart Spirit, leading to Deficient Kuang. For new-onset Kuang before other symptoms appear, bleed the Ququan points on both sides of the Liver meridian; if severe, bleeding suffices. If unhealed after a while, moxa the patella twenty burns. This section differentiates Kuang into Excess and Deficiency, treating early stages by clearing Liver Wood Qi to prevent invasion of the Heart Spirit.

In *Su Wen: Tong Ping Xu Shi Lun*, the Emperor asked: What about Dian disease? Qibo said: If the pulse is large and slippery, it will heal spontaneously over time. If small, firm, and rapid, it is fatal and untreatable. The Emperor asked: Regarding Dian pulse, what of Excess and Deficiency? Qibo said: Deficient pulse is treatable; Excess pulse is fatal. This section generally discusses that Dian disease belongs to excessive Yin qi. Yin excess leads to Yang deficiency. Thus, a large and slippery pulse indicates Heart and Liver Yang have not yet failed and show signs of recovery, hence spontaneous healing. A small, firm, and rapid pulse indicates pure Yin without Yang, hence fatal. A deficient pulse implies deficient pathogen; an Excess pulse implies Excess pathogen ("Excess" meaning firm/rapid), hence also fatal.

*Ling Shu: Dian Kuang Pian* states: Early Dian begins with unhappiness, heavy head pain, red eyes, extreme fatigue followed by vexation; diagnose by observing facial complexion. This indicates Jue Qi ascending to Heaven Qi and Taiyang Jun Fire. Dian involves Yin-Yang Qi, first Jue at the lower body, then ascending to the vertex; observe facial Qi color. It also states: Early Dian involves mouth traction, crying, panting, and palpitations; this indicates Taiyang governs opening, Yangming governs closing; Jue Qi ascends, disrupting opening/closing functions. Another case: Early Dian involves initial rigidity and spinal pain; this indicates Jue Qi reversing in the Cold-Water Taiyang meridian and Cold Qi invading the Earth region (lower body). Treatment involves living with the patient to identify acupoints. Upon attack, observe pathological meridians and apply draining method; place blood in a gourd vessel. If the blood moves during the attack, it reflects the movement of Heaven Qi/Taiyang; observe Hand Taiyang, Hand Yangming, Hand Taiyin. If blood does not move, the disease has sunk into Earth/Water; observe Foot Taiyang, Foot Yangming, Foot Taiyin; moxa the patella twenty burns. Early intervention is crucial; late-stage bone, tendon, or vessel Dian are often untreatable (*Xia Jing*).

Regarding Xian (Epilepsy) syndrome: *Su Wen: Qi Bing Lun* asks: Congenital Dian disease? Name and origin? Qibo answers: Named Tai Bing (Fetal Disease), acquired in utero when the mother suffered great fright. Qi ascended instead of descending, essence and Qi co-resided, causing fetal Dian. This describes congenital epilepsy due to maternal fright, where essence and fright Qi co-reside. However, some cases arise from sudden fright post-birth; fright scatters the Spirit, allowing Phlegm-Drool to invade. Xian differs from Dian/Jue by producing animal-like sounds during collapse and spitting foam upon waking. Blood confusion mimics Dian: excessive menstrual bleeding or postpartum lochia rushing upward confuses the Heart, causing disordered speech and restless spirit due to Blood deficiency and Spirit consumption. Heart Wind mimics Dian: vague spirit, erratic emotions/speech, milder than Dian; all caused by Phlegm-Qi disorders, requiring differentiation.