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[Standard Names, Discussion on Initial Infection, Discussion on Double-Striking Cold, Examples of Manifestations and Treatments for the Six Meridians, Yin-Yang Similar Syndromes, Yin-Yang Toxins, Kidney Cold Damage, Discussable and Non-Discussable Methods of Sweating, Vomiting, and Purging, Changed Syndromes, Essentials of Syndrome Differentiation, Essentials of Pulse Examination, General Principles of Medication, Methods for Cold Damage]

The Classic states: When wind-cold pathogens invade the human body, they cause the fine hairs to stand erect, the skin pores to close, and heat to arise. It also states: Whenever one is injured by cold, it manifests as a heat disease; even if the heat is severe, death does not ensue. However, if one suffers from "double-striking cold" (simultaneous invasion of exterior and interior meridians by cold), death is inevitable. "Cold damage" refers to the disease contracted immediately after exposure to cold between the Frost Descent solar term and the Spring Equinox. In winter, cold lies latent in the muscles and bones; in spring, following the rising of yang qi, or upon re-exposure to cold pathogens, warm diseases are triggered. The Classic states: "Injury by cold in winter leads to warm diseases in spring." This is exactly what is meant. Diseases manifesting in the third and fourth months are named "late onset." Those郁结 (stagnant) until the fifth and sixth months are named "heat diseases." Summer fevers with high heat but no aversion to cold are termed "Zhong Yue" (Heatstroke). Headache with cold calves and abdominal fullness is termed "Damp-Warmth." Body heat with cold feet, neck stiffness with aversion to cold, head shaking, jaw clenching, and opisthotonos (backward arching of the body) are termed "Jing Syndrome" (Spasm). If spring should be warm but is cold, summer hot but cool, autumn cool but hot, and winter cold but warm, illness caused by such non-seasonal qi is named "Shi Qi" (Seasonal Qi Epidemic). If infection spreads through households, affecting all ages with identical symptoms, it is named "Yi Li" (Plague/Epidemic). Sudden onset of illness due to abrupt exposure to wind-cold is named "Gan Mao" (Common Cold). Additionally, there are Winter Warmth, Warm Toxin, Cold Epidemic, Wind-Dampness, etc., totaling fourteen syndromes of the same category. Generally, body heat without sweating belongs to cold pathogens and can be treated with the main formula to induce sweating; body heat with sweating belongs to wind or dampness and can be cured by stopping sweat according to modified formulas.

There are four syndromes resembling cold damage: Headache and fever with no body pain, flourishing pulse at the cunkou (radial artery), aversion to food, and desire to vomit indicate Food Stagnation. No headache, body pain with aversion to cold, or irritability with fever, frequent headaches, and insomnia indicate Deficient Irritability. Aversion to cold with fever, no headache or neck stiffness, rapid breathing, chest fullness, and slippery-large pulse indicate Cold Phlegm. Fever with aversion to cold, vomiting green water, red and swollen painful legs and feet, and pain radiating to the heart when severe indicate Hong Kong Foot (Beriberi/Foot Qi) (each has its own category). Aversion to cold with rigidity, vomiting after eating, severe irritability, dizziness, rapid breathing, and floating-tight pulse indicate Swelling Toxins, Ding Sores, or Carbuncles (treat according to surgical methods). Fever arising from falls, injuries, or sprains indicates Blood Stasis. Women with amenorrhea or yin deficiency and blood insufficiency may also present with aversion to cold, fever, and rigidity; these must be carefully distinguished. If cold damage patients mistakenly consume pathogenic food, or other syndromes are mistaken for cold damage and grain/food intake is cut off, it causes further harm to the body; caution is advised.