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(Following the discussion on acupuncture for lumbar pain)

Wind is agile in its movement and prone to frequent changes. When the couli (pores and interstices of the skin) are open, one feels a sudden chill; when they are closed, one experiences heat and chest oppression. When cold predominates, food and drink intake decline (as cold causes stagnation of Stomach Qi); when heat predominates, muscles waste away (as heat dries up body fluids). Thus, it causes shivering (sound 'tu', meaning trembling) and inability to eat. This condition is named "Chills and Fever" (Li refers to trembling).

When wind pathogen enters the Yangming channel and the Stomach, it follows the meridian upwards to the inner canthus of the eye. If the person is obese, the wind cannot diffuse outward, leading to "Heat in the Middle" (Jiao Re Zhong), characterized by yellow eyes (due to internal stagnation of wind generating heat). If the person is emaciated, the wind diffuses outward easily, leading to "Cold in the Middle" (Han Zhong), characterized by tearing (due to loose couli allowing cold to invade internally).

When wind enters together with the Taiyang channel, it travels through the Shu points of various meridians and scatters between the muscle layers (fen rou), interfering with Wei Qi (Defensive Qi). Due to obstructed pathways, this causes muscle swelling and sores (Fen means swelling; Yang refers to carbuncles and toxins). If Wei Qi coagulates and fails to circulate, the flesh becomes insensible (numbness and loss of pain/itch sensation).

Leprosy (Li Feng) arises from hot Ying Qi (Nutritive Qi) causing corruption, resulting in turbid Qi. This leads to the collapse of the nasal bridge, deterioration of complexion, and ulceration of the skin. When Wind-Cold lodges in the meridians and does not depart, it is called Leprosy (referring to ulceration).

If wind invades the Back-Shu points of the Zang-Fu organs, it becomes Wind of the Zang-Fu. Entering through their respective gates, it causes Pi Feng (Hemiplegia).

If wind ascends along the Fengfu point (GV16), it becomes Brain Wind. If wind enters the ocular system (located at the back of the head), it becomes Eye Wind and Cold Eyes. If wind strikes after drinking alcohol, it becomes Leaking Wind (symptoms include excessive sweating, intolerance to thin clothing, sweating upon eating, severe cases involving whole-body sweating and panting, aversion to wearing clothes, wet garments, dry mouth, thirst, and inability to perform labor).

If wind strikes after sweating following sexual intercourse, it becomes Internal Wind (wind exploits deficiency, causing seminal emission, hemoptysis, night sweats, and bone-steaming fever).

If wind strikes after washing hair, it becomes Head Wind (excessive sweating and aversion to wind on the head and face; symptoms worsen one day before windy weather with severe headache preventing washing or combing, improving on the day of the wind).

If wind remains in the body for a long time, it becomes Intestinal Wind and Undigested Food Diarrhea (entering the intestines and stomach; heat causes bloody stool, cold causes diarrhea).

If wind stays at the couli externally, it becomes Leaking Wind (excessive sweating soaking clothes, dry mouth, wind rising upward, inability to labor, body ache with chills).

Therefore, wind is the chief of all diseases. Its transformations lead to other illnesses without fixed patterns, yet all stem from wind pathogen.

The presentation of Lung Wind includes: excessive sweating, aversion to wind, pale white complexion, occasional cough and shortness of breath, milder during the day and worse at evening. Diagnosis is located above the eyebrows, showing a white color.

The presentation of Heart Wind includes: excessive sweating, aversion to wind, dry throat and lips, irritability and fright, red complexion. In severe cases, speech is slurred. Diagnosis is located at the mouth, showing a red color (Jiao refers to dry throat/tongue; Jue refers to cracked lips; the Heart meridian flanks the throat and governs the tongue, hence these symptoms).

The presentation of Liver Wind includes: excessive sweating, aversion to wind, propensity to sadness, slightly blue-green complexion, dry throat, irritability, and sometimes aversion to women (Liver deficiency leads to aversion to beauty). Diagnosis is located below the eyes, showing a green color.

The presentation of Spleen Wind includes: excessive sweating, aversion to wind, lethargic body, limbs unwilling to move, pale yellow complexion, and poor appetite. Diagnosis is located on the nose tip, showing a yellow color.

The presentation of Kidney Wind includes: excessive sweating, aversion to wind, puffy facial edema resembling warts, back pain preventing standing upright (due to bone weakness), dark/dull complexion, difficult urination, and abdominal distension. Eating cold foods causes diarrhea. Diagnosis shows a thin body with a distended abdomen.