【Nature and flavor】Spicy, sweet, hot.
 [Effects] It is the dry bark and branch bark of the cinnamon bark of the Lauraceae family. It is mainly used to treat the decline of the gate of life fire, cold limbs and weak pulse, yang deficiency and collapse, abdominal pain and diarrhea, cold hernia and running pig, cold pain in the waist and knees, amenorrhea, lumps, yin carbuncle, leukorrhea, and floating of false yang, heat on the upper body and cold on the lower body.
 [return through meridians] enters kidney meridian, spleen meridian and bladder meridian.
 [Indications] Tonify the primordial yang, warm the spleen and stomach, remove cold accumulation, and dredge the blood vessels. Treat the decline of the fire in the gate of life, cold limbs and weak pulse, yang deficiency and collapse, abdominal pain and diarrhea, cold hernia and running pig, cold pain in the waist and knees, amenorrhea, lumps, yin carbuncle, leukorrhea, and floating of the false yang, heat on the upper body and cold on the lower body.
 [Usage and Dosage] For oral use: decoct in water, 2-5g, not suitable for long-term decoction; grind into powder, 0.5-1.5g; or make into pills.
 For external use: take appropriate amount, grind into powder, and apply; soak in wine, and rub.
 [Note: Taboos] It is contraindicated in patients with Yin deficiency and hyperactivity of fire, and pregnant women should take it with caution.
 【Medical records】
 "Shennong's Herbal Classic": It can treat cough and reverse breathing, vomiting and inhalation caused by gas stagnation in the throat, benefit the joints, and replenish the middle and benefit the Qi.
 "Bie Lu": It can treat heartache, hypochondriac wind, hypochondriac pain, warm tendons, dredge meridians, stop restlessness and sweating. It can warm the middle, benefit the liver and lung qi, treat cold and heat in the heart and abdomen, cold diseases, cholera cramps, headaches, back pain, stop saliva, coughs, and nasal congestion; it can induce abortion, strengthen bones and joints, dredge blood vessels, and relieve insufficiency; it can promote hundreds of medicines and be fearless.
 "Materia Medica": It can treat nine kinds of heartache, kill three kinds of worms, break blood, relieve menstrual blockage, treat soft feet, numbness, numbness, retained placenta, eliminate cough, qi stagnation, numbness, stop cold air in the abdomen, unbearable pain, treat diarrhea, nasal polyps. Kill plant poison.
 "Bencao Gangmu" (Bencao Gangmu): It can cure all kinds of wind-related diseases, replenish the five kinds of fatigue and seven kinds of injuries, open the nine orifices, benefit the joints, improve the essence, improve the eyesight, warm the waist and knees, break up lumps and tumors, eliminate blood stasis, treat rheumatism, joint contracture, repair tendons and bones, and grow muscles.
 "Zhenzhunang": removes wind evil in the Wei system and relieves lower abdominal pain in autumn and winter.
 "The Origin of Medicine": It replenishes the deficiency of the lower burner, treats deep cold, chronic cold and spontaneous sweating due to superficial deficiency.
 "Compendium of Materia Medica": It can treat cold arthralgia, aphonia, blood loss due to yin excess, diarrhea, convulsions, and blood loss due to yang deficiency, and can treat carbuncles, ulcers, and pox. It can induce blood to turn into sweat and pus, and can detoxify snake venom.
 【Predecessors release medicine】
 "Ben Cao Jing Shu": cinnamon twig, cinnamon heart, cinnamon bark, the five flavors are pungent and sweet, which are yang, and the four qi are hot, which is also yang; the taste is pure yang, so it can disperse wind and cold; it can fill the outside from the inside, so it can strengthen the surface; pungent to disperse, hot to move, sweet to harmonize, so it can enter the blood and promote blood circulation, moisten the kidney dryness. Its main function is to benefit the liver and lung qi, headache, sweating, stop restlessness, stop salivation, cough, nasal congestion, insufficient sedation, spontaneous sweating due to deficiency of the surface, and pain in the joints due to wind arthralgia are also treated by cinnamon twig. Because all diseases are caused by the deficiency of the surface that cannot withstand wind and cold, and the cold evil guest, so all of them are treated, because they can strengthen the surface and expel evil. It is used to treat cold and heat diseases in the heart and abdomen, cholera cramps, back pain, abortion, warm the middle, strengthen the tendons and bones, dredge the blood vessels, promote the circulation of all medicines, and replenish the deficiency of the lower part of the body, treat chronic cold, seep, quench thirst, stop the cold in the middle of the blood and body defense, and treat the lower abdominal pain in autumn and winter caused by cold, replenish the gate of life, and replenish fire and eliminate yin. This is what cinnamon can treat. The qi is thin and light, floating up to the surface, so cinnamon twig treats the disease of evil invaders in the exterior. The taste is thick, sweet, spicy and hot, and it moves downward to the interior, so cinnamon and cinnamon heart treat the deficiency of true fire in the gate of life, yang deficiency and cold in the middle, and all the diseases of deficiency of the interior and cold of the yin, and the cold evil invaders in the interior. Because cinnamon and cinnamon heart are sweet, spicy and hot, they can replenish yang; sweet enters the blood, spicy can move horizontally, and heat can make it pass, and these three are combined, so it is good at promoting blood circulation.
 "Compendium of Materia Medica" says: Cinnamon is a medicine for treating deep cold and chronic cold. For all cases of deficiency of the Yuan and loss of Yang, or pain in the heart, abdomen and waist with vomiting, diarrhea, or long-term deficiency of the heart and kidney with chronic cold and fear of cold, or cold hernia with the feeling of dying, or cold in the stomach with roundworms and fullness and distension of the heart and diaphragm, or condensation of Qi and blood with obstruction of the meridians, this thick, sweet, spicy and hot food, which moves downward, strengthens the Yang of the gate of life, plants the Qi of the heart and kidney, promotes all kinds of medicine, and makes the Yang grow and the Yin disappears, and the above symptoms disappear.
 "Compendium of Materia Medica": Cinnamon is good at calming the Yin evil of the liver wood, but it is not known to be good at supporting the Yang Qi of the liver and gallbladder. However, it is sweet in taste, so it is the best for nourishing the spleen and earth. It is very useful for those with liver evil that overcomes the earth but without fire. It is used together with ginseng, aconite and rehmannia root to reduce false fire and treat the deficiency of the lower Jiao Yuan Yang; it is used together with angelica and Chuanxiong to treat women's postpartum blood stasis, children's pillow pain, and children's smallpox and cold, itching and inability to get up.
 "Compendium of Materia Medica": Cinnamon bark can dispel cold evil and benefit qi, descend and nourish the kidney, guide fire back to its origin to clear qi, reach the uterus and break blood to induce abortion. It is a strong and aggressive drug that can move and stay. If the cold invades the kidney meridian, it can also rush to harmonize blood and qi, and it is necessary to use it when the pulse is slow. It is effective in removing blood stasis, treating hernia, and eliminating carbuncle. Although blood is yin, the user must use it to harmonize yang.
 "Compendium of Materia Medica" states: Cinnamon bark has a sweet and spicy smell, and its color is purple and red. It has the ability to invigorate blood and qi, and its nature is pure yang, which has the power to attract and induce. Ancient people said that this body has a light and rising qi, which can not only tonify the gate of life, but also reach the surface to pass through the Ying and Wei. It is not like the smell of aconite, which is spicy and slightly bitter, reaching from top to bottom, only consolidating the true yang, but not entering the acquired function. Therefore, for all patients with cold reversal, it is appropriate to warm the middle, and if it is due to the disharmony of qi and blood, it is not necessary to use aconite, but only to tonify the blood and qi, and add cinnamon bark as an adjuvant, such as Shiquan Dabu and Renshen Yangrong, which use this, which is the meaning.