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When cold qi merges into the Yin aspect, chills manifest; when Yang qi merges into the Yang aspect, fever manifests. Due to the imbalance of deficiency and excess between Yin and Yang Qi (Vital Energy), pathogenic factors alternate in their activity, resulting in alternating chills and fever (alternating sensations of cold and heat).

A tight and rapid pulse indicates simultaneous onset of chills and fever, which must be treated with purgation (draining downward) to achieve recovery. A pulse tense as a string indicates pathogenic invasion of the Yangming Channel (Yangming Meridian), presenting with chills and fever. A significantly small Spleen pulse indicates chills and fever. The *Yangsheng Fang* states: consuming alcohol and food to satiety can induce chills and fever.

When the Ying (Nutritive) and Wei (Defensive) Qi are disordered, it causes stagnation and obstruction of Yin and Yang. When Yang Qi aggregates in the upper part, the upper body becomes hot; when Yin Qi aggregates in the lower part, the lower body becomes cold. Heat in the Upper Jiao (Upper Burner) may cause sores in the throat and mouth, and irritability and fullness in the chest and diaphragm; cold in the Lower Jiao (Lower Burner) leads to abdominal distension, borborygmus (intestinal rumbling), colic, diarrhea, and dysentery.

"Jue" (Reversal/Colliculus) refers to reversal or counterflow. It signifies that Yin and Yang Qi suddenly decline or sever, deviating from normal physiological limits. If Yang Qi declines in the lower part, it forms Cold Jue (Cold Reversal); if Yin Qi declines in the lower part, it forms Hot Jue (Hot Reversal).

The heat in Hot Jue invariably begins at the soles of the feet. This is because Yang Qi originates on the lateral side of the five toes, while Yin meridians converge at the sole and gather at the center of the foot. Thus, when Yang Qi prevails, the soles become hot. In Hot Jue, wine enters the Stomach, causing the Luo (Connecting) vessels to be full while the Jing (Main) vessels are empty. The Spleen governs transporting fluids for the Stomach. When Yin Qi is deficient, Yang Qi sinks inward; when Yang Qi sinks inward, Stomach Qi becomes disharmonious; when Stomach Qi is disharmonious, Essence-Qi (Jing-Qi) is exhausted; when Essence-Qi is exhausted, it fails to nourish the four limbs. Such individuals likely engage in sexual intercourse after frequent drunkenness or overeating. Qi gathers in the Spleen without dispersing; wine Qi and Grain Qi combine, generating internal heat that spreads throughout the body. Internal heat causes dark urine. Wine Qi is potent and fierce; if Kidney Qi is weak, Yang Qi alone prevails, causing heat in the hands and feet.

The cold in Cold Jue invariably starts at the toes and extends upward below the knees. Yin Qi originates from the medial side of the five toes, converges below the knees, and gathers above the knees. Thus, when Yin Qi prevails, coldness extends from the toes to above the knees. This cold does not come from outside but arises entirely from internal cold. Why does this happen? The anterior yin is the gathering place of the Zong Jin (Tendon Sheath/Major Tendons) and the convergence of the Taiyin and Yangming channels. In spring and summer, Yang Qi is abundant and Yin Qi declines; in autumn and winter, Yin Qi is abundant and Yang Qi declines. Individuals with robust constitutions who deplete their vitality during autumn and winter (e.g., through excessive sexual activity) experience contention of lower Qi rising upward, failing to recover. Essence-Qi leaks downward, and pathogenic factors follow upward. Qi becomes stagnant in the middle, Yang Qi declines, and fails to permeate and nourish the collaterals. Consequently, Yang Qi diminishes daily, leaving Yin Qi alone, resulting in cold hands and feet.

Jue syndrome may cause abdominal fullness, sudden loss of consciousness, or unconsciousness lasting half a day to a day before recovery. This occurs because Yin Qi is excessive in the upper part, causing lower Qi to press upward, leading to rebellious pathogenic Qi. Rebellion disrupts Yang Qi, and disruption leads to loss of consciousness.

Taiyang Jue presents with pain at the heels, heaviness of the head, inability to walk, and sudden collapse. Yangming Jue presents with manic epilepsy, desire to run and shout, abdominal fullness, inability to lie down, and upon lying down, facial redness, heat, visual hallucinations, and incoherent speech. Shaoyang Jue presents with sudden deafness, swollen cheeks, chest heat, hypochondriac pain, and inability to move. Taiyin Jue presents with abdominal distension, difficulty in defecation, anorexia, vomiting after eating, and insomnia. Shaoyin Jue presents with dry tongue, dark urine, abdominal fullness, and heart pain. Jueyin Jue presents with swelling and pain in the lower abdomen, abdominal distension, difficulty in urination and defecation, preference for lying down with knees flexed, contraction and swelling of the genitals, and heat in the medial aspect of the shins. Treatments involving decoctions, moxibustion/warming, acupuncture, and stone therapy have separate specific formulas. Nourishing and guiding exercises are attached hereafter.

The *Yangsheng Fang · Daoyin Method* states: Lie supine, extend both legs, inhale through the nose, exert yourself to the limit, breathing seven times, then shake the feet thirty times and stop. This eliminates cold feet and Jue reversal.