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Chapter 9 of 20
本草纲目
The "Fire" section of the Compendium of Materia Medica (Bencao Gangmu) is devoted to the medical applications of various types of fire. This chapter covers five categories: Charcoal Fire, Moxa Fire, Needle Fire (i.e., fire needling), Lamp Fire, and Divine Needle Fire. The core principle is "using the warmth of fire to disperse cold, unblock meridians, restore yang, and rescue from collapse." Ancient physicians believed that fire possesses a warm nature 🔥 that can warm and unblock the meridians, expel cold pathogens, and activate qi and blood circulation. They therefore applied different forms of fire—charcoal embers, burning moxa, heated needles, lamp flames, and peach-wood fire—to treat different conditions.
Charcoal Fire: The ancients did not use open flames directly for treatment, but rather used charcoal powder or charcoal ash left after burning. Charcoal powder was believed to have adsorbent, astringent, and hemostatic properties: for accidental ingestion of metal objects, charcoal powder was taken orally to help envelop and expel the object; for throat obstruction, charcoal honey pills were held in the mouth for relief; for White Tiger Wind disease (migratory severe joint pain, similar to acute gout attacks or rheumatic arthritis in modern terms), charcoal ash was mixed with earthworm casts (earthworm excrement, which ancients believed could unblock collaterals) and safflower, then decocted and applied as a hot compress; for intestinal wind with bleeding (intestinal hemorrhage), charcoal powder combined with bitter orange husk ash was taken orally; for burns and scalds, charcoal powder blended with sesame oil was applied topically; for tinea capitis (scalp fungal skin disease), warm charcoal water was used for washing; for scrotal dampness and itching, bran charcoal with perilla leaves was applied externally.
Moxa Fire: Moxa fire is the core of moxibustion therapy. The ancients would dip moxa stalks in sesame oil, ignite them, and slowly irradiate the area above abscesses and swellings, allowing the warmth and medicinal properties of moxa to penetrate the affected site. For rheumatic pain, a small amount of sulfur was added to moxa leaves, rolled into paper spills, dipped in oil, ignited, and used for irradiation—this "irradiation" was actually a mild form of moxibustion, allowing the fire qi (warming power) to permeate the skin and muscles.
Needle Fire (Fire Needling): Steel needles were heated to red-hot over a sesame oil lamp and immediately inserted into acupoints or lesions. The ancients believed fire needling was "devised for tendons that are cold and spasmodic"—i.e., conditions of severe muscular contracture and cramping due to cold. Later, its applications expanded to accumulations (masses), carbuncles, and even febrile diseases (though the ancients themselves admitted it would "inevitably produce some side effects"). The effective uses were summarized into four categories: ① wind-cold-induced tendon spasms, contractures, and arthralgia (acute cramping); ② paralysis with loss of sensation (numbness and hemiplegia); ③ abdominal masses and accumulations; ④ deep abscesses with pus but no visible head. The operational points are: for the first two categories, insert quickly and withdraw quickly, then press the needle hole immediately to stop pain; for the third category, the needle may be rotated and withdrawn slowly; for the fourth, the needle hole should not be pressed, allowing pus to drain. If fever and chills appeared after needling, the ancients regarded this as a favorable sign that "the treatment was on target." They also cited the Lingshu Jing (Spiritual Pivot), emphasizing: needling should be stopped once the patient feels sensation internally; if the patient cries out in pain, that is not ideal. Fire needling was contraindicated on the face, in hot humid summer conditions, and on the feet.
Lamp Fire: Using lamps lit with sesame oil or perilla seed oil, the ancients employed lamp fire extensively in pediatrics and emergency care. For infantile convulsions, coma, spasms, and upward-rolling eyes, the lamp flame was used to quickly touch-burn (flame flicking) specific sites: for eyes rolling backward, burn the fontanel and the area between and above the eyebrows; for eyes rolling upward without coming down, burn above and below the navel; for unconsciousness, burn the palms, soles, and chest; for clenched fists with upward-rolling eyes, burn the fontanel and both palms; for foaming at the mouth, burn the mouth area and the palms and soles. For wind-type headache with distension, burn the temple points (taiyang); for external hemorrhoids with swelling and pain, burn the affected area; for newborns showing signs of imminent death due to cold, a lamp vessel was moved back and forth below the navel to allow the warm qi to enter the abdomen and revive the child. Lamp fire was also used to treat Intestinal Twisting Sand (severe abdominal pain, cold extremities, and red spots on the skin, similar to cryptosporidiosis-type acute abdomen), by burning the red spots.
Divine Needle Fire: Peach wood branches were whittled into needle shapes (about the thickness of an egg, five to six cun long), dipped in sesame oil, and ignited. The open flame was then blown out, and the residual heat was applied to the affected area with cotton paper interposed. This was used primarily for cold-pain in the heart and abdomen, wind-cold-damp bi syndrome (arthralgia), and bone-attached abscesses (deep chronic sores near bone), allowing the fire qi to reach the disease site directly through the warming and unblocking properties of peach wood.
The classificatory thinking of "fire" as an independent therapeutic modality. Li Shizhen abstracted "fire" from its merely cauterizing role and subdivided it into five categories—charcoal fire, moxa fire, needle fire, lamp fire, and divine needle fire—each with different properties, flavors, meridian affinities, and indications. This reflects traditional Chinese medicine's principle of "like qi resonating with like" — different fires have varying emphases in their warming nature, penetrating power, and drying-dampness ability: charcoal fire leans toward astringency and adsorption; moxa fire toward warming penetration; needle fire toward reaching deep structures directly; lamp fire toward emergency rescue and yang restoration; and divine needle fire toward penetrating bones and sinews.
The external treatment principle of heat ironing and warming unblocking. The use of charcoal ash hot compresses for White Tiger Wind disease, moxa irradiation for rheumatic pain, and divine needle fire for deep bone-muscle pain—all embody the fundamental treatment principle of "cold conditions are treated with heat." The ancients believed that bi (obstructive) pain mostly results from the intermingled invasion of wind, cold, and dampness, which stagnate in the meridians, leading to "pain from blockage." Applying fire's warmth externally to penetrate inward can disperse cold pathogens, activate qi and blood, and relax tendon spasms.
The indications and contraindications of fire needling embody the dialectical spirit of "use the method only when the syndrome calls for it." Fire needling was initially devised specifically for cold-induced tendon spasms; later expansion to accumulations and carbuncles was based on the theoretical deduction that "cold congealing creates accumulations; heat dispersing dissolves them." However, the ancients themselves explicitly noted that using it for febrile diseases would "produce some side effects," demonstrating that clinical observation and reflection already existed at that time. The caution regarding needle depth—"too deep damages the meridians, too shallow fails to eliminate disease"—along with the assessment standard from the Lingshu Jing that "needling is sufficient when the patient feels internal sensation; if the patient cries out in pain, it is not good"—reflects the importance placed on Deqi (needling sensation).
The adsorptive properties of charcoal powder have a certain scientific basis. Activated charcoal remains used in modern medicine for adsorption management in acute poisoning. The porous structure formed by high-temperature treatment of wood charcoal does indeed possess physical adsorption capability. While the ancients' use of charcoal powder for accidental metal ingestion has not been validated in modern studies (ingested sharp metal objects require emergency medical attention, not self-treatment), their observation of charcoal's adsorptive properties was directionally reasonable. External use of charcoal powder for oozing skin conditions also aligns with its physical properties of drying and adsorption.
The warming effects of hot ironing and moxibustion have a modern physiological basis. Local heat application can dilate blood vessels, improve circulation, and relieve muscle spasms—a mechanism that resonates with the ancient description of "warming and unblocking meridians." The warming and infrared radiation effects of moxibustion have received some attention in modern research. Fire needling continues to be used as a distinctive therapy in some TCM clinical settings; modern research suggests it may activate tissue repair mechanisms through thermal stimulation and localized micro-trauma, though the overall level of evidence is limited, and its definitive efficacy and safety require more rigorous clinical studies.
Lamp-fire moxibustion in pediatrics requires extreme caution. Directly applying open flames to infants' skin poses clear infection and burn risks from a modern medical perspective, with no reliable evidence of therapeutic efficacy. The practice of moving a lamp below the navel of an asphyxiated newborn to "let warm qi enter the abdomen" has been completely replaced by modern resuscitation techniques (warming, airway clearance, positive-pressure ventilation, etc.); delaying proper emergency care could cause irreversible damage.
Historical limitations should be frankly acknowledged. While earthworm casts, safflower, and vinegar mixed as a hot compress for White Tiger Wind disease may have local warming effects, the ancients' understanding of "White Tiger Wind" is fundamentally different from today's understanding of gout (urate crystal deposition) or rheumatoid arthritis pathology. The assessment standard of "it is enough if the patient feels internal sensation" is heavily empirical. As for "fever and chills after needling as a good sign," from a modern standpoint, any fever or chills following an invasive procedure should first raise concern for infection, not be welcomed as a positive treatment response.
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This content is based on classical Chinese medical texts and is provided solely for traditional cultural learning and study. It does not constitute any medical diagnosis, medication, or treatment advice. If you feel unwell, please seek medical attention promptly.