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This condition arises from the deficiency of the collateral vessels of the Hand-Shaoyang (Triple Burner) meridian, which are invaded by Wind pathogen. The Hand-Shaoyang meridian originates at the tip between the little and ring fingers, ascends along to the Keyhole (Quepen, LI15) acupoint, distributes in the chest center, and scatters to connect with the Pericardium. When Wind pathogen resides in this meridian, the pathogenic qi presses upon the collateral vessels of the Heart, preventing the Heart qi from flowing freely and smoothly; thus, vexation and fullness occur. If the pathogen attacks upward to the chest or pulls downward to the hypochondrium, it causes vexation, fullness, and pain in the chest and hypochondrium that leads the patient to cross their arms over the chest. If the disease persists for a long time, the pathogen lingers and knots with the Zang organs to form "Ji" (accumulation masses), or knots with the Fu organs to form "Ju" (gathering masses).

Shuigu Di (Dysentery with undigested food) occurs due to physical weakness, open interstices (Couli), and deficiency of Blood and Qi. After being injured by Wind in spring, the pathogen remains lingering within the muscles. Later, when the Spleen, Stomach, and Large Intestine become weak, the pathogen takes advantage of this deficiency to invade, resulting in Shuigu Di.

The Spleen and Stomach are exterior-interior paired; the Stomach is the Fu organ of the Spleen and serves as the sea of water and grain; the Spleen is the Zang organ of the Stomach, and its manifestation reflects on the muscles of the body. The Spleen governs the digestion of water and grain. Once digested, the essence transforms into Ying (Nutritive) and Wei (Defensive) Qi, which nourish the Zang-Fu organs in the middle jiao and fill the muscles. The Large Intestine is the Fu organ of the Lung, serving as the official of transmission, where changes and excretion occur. The essence of water and grain transforms into Blood and Qi, circulating through the meridians, while the dregs travel through the Large Intestine. The Lung and Large Intestine are exterior-interior paired; the Lung governs Qi, and its manifestation reflects on the skin and hair. In spring, although Yang Qi floats to the exterior, the internal Blood and Qi are still weak. Improper diet, lifestyle, or excessive labor can lead to Blood and Qi deficiency, making one susceptible to Wind pathogen, which lodges in the muscles. Subsequently, due to Spleen-Stomach Qi deficiency, Wind pathogen invades the intestines and stomach. With weak Spleen Qi, the transformation and transportation of water and grain cannot be controlled, causing the dregs to fail to consolidate and instead becoming dysentery.

Furthermore, contracting Wind immediately after eating is called "Wei Feng" (Stomach Wind). Its symptoms include aversion to wind, profuse sweating on the head, blockage below the diaphragm, inability to swallow food and drink, abdominal fullness, emaciation of the body with a distended abdomen, worsening blooding when clothing is insufficient, and severe watery diarrhea (Dongxie) after consuming cold foods. Dongxie refers to uncontrolled dysentery/diarrhea; if Stomach Qi is exhausted and the dysentery stops (indicating the cessation of Zheng Qi), death ensues.

Diagnostically, a faint pulse with cold hands and feet indicates a difficult-to-treat case; a large pulse with warm hands and feet indicates an easy-to-treat case. Passage of white mucus/froth: a deep pulse suggests survival, while a floating pulse suggests death. Absence of fever and non-hanging-extreme pulse: a slippery and large pulse suggests survival, while a hanging and choppy pulse suggests death, based on the timing of Zang organ decline. Pulse extinction with cold hands and feet indicates death; pulse recovery with warm hands and feet indicates survival; failure of pulse recovery indicates death. A slow pulse with occasional small knotted beats suggests survival; a surging, large, and rapid pulse indicates death. A hanging and choppy pulse indicates death; a fine, minute, and choppy pulse, or a tight, large, and slippery pulse, indicates death. Appearance of Dai Mai (intermittent pulse) with extinction also indicates death.

The *Yangsheng Fang* states: The three months of autumn are called "Rong Ping" (Container and Level/Convergence). The heavenly Qi becomes urgent, and the earthly Qi becomes clear. One should sleep early and rise early, waking with the chickens. Keep the mind peaceful to mitigate the harshness of Autumn Qi. Converge the Shen (Spirit) to maintain balance with Autumn Qi. Do not let desires scatter outward, so that Lung Qi remains pure and refined. This is the response to Autumn Qi and the way of nurturing "Gathering." Violating this injures the Lungs, leading to Sun Xie (undigested stool diarrhea) in winter.

It also states: In the fifth month, do not consume unripe fruits, peaches, or dates, as they may trigger carbuncles and furuncles. Otherwise, they may cause alternating chills and fever, transform into Jaundice, or induce diarrhea and dysentery.