[Nature and flavor] Spicy and sweet, warm in nature.
 [return through meridians] Returns to the lung, heart and bladder meridians.
 [Effects] Inducing sweat and relieving exterior symptoms, dispelling cold and relieving pain, promoting yang and transforming qi, and balancing and descending qi.
 [Indications] Cold due to wind and cold, cold pain in the abdomen, amenorrhea due to cold blood, joint pain, phlegm and fluid, edema, palpitations, etc.
 [Usage and Dosage] Decoction, 3-10g.
 [Contraindications] Cinnamon twig is pungent and warm, and can easily arouse yin and blood. It should not be used for exogenous febrile diseases, yin deficiency and hyperactivity of fire, and blood heat. Pregnant women and those with excessive menstrual flow should use it with caution.
 【Medical records】
 Cheng Wuji: "It relieves the running pig, harmonizes the skin and skin, and disperses the blood accumulation in the lower part of the body." "It benefits the lung qi."
 "Medical Origin": "Main Instructions": It can cure colds and headaches, open the pores, relieve the symptoms, and remove rheumatism (the last two characters are supplemented by "Compendium of Materia Medica")."
 "Ben Cao Jing Shu": "It can dispel pathogenic factors and benefit the liver and lung qi, and treat headaches, rheumatism, joint cramps and pains."
 "Pharmaceutical Chemistry": "It is used exclusively in the upper shoulders and arms, and can deliver medicine to the painful area to remove phlegm and blood stasis between the limbs."
 "Compendium of Materia Medica": "Warms the meridians and dredges blood vessels, induces sweat and relieves muscle pain."
 "New Compendium of Materia Medica": "It warms the middle and promotes blood circulation, strengthens the spleen and dries the stomach, reduces swelling and eliminates dampness. It treats cold and numb hands and feet, muscle cramps and pain, and external cold symptoms."
 【Predecessors release medicine】
 "The Secret of Using Medicines" states: "The smell and taste of cinnamon twig are both light, so it can go up and disperse on the surface."
 Wang Haogu: "Someone asked, "Compendium of Materia Medica" says that cinnamon can stop restlessness and sweating, but Zhang Zhongjing said that sweating should be induced in treating typhoid fever, and he used cinnamon twig decoction in several places; he also said that if there is no sweating, cinnamon twig should not be taken, and if sweating is not induced, it is not allowed to induce sweating. If cinnamon twig is used, it will induce sweating. If there is a lot of sweating, cinnamon twig and licorice decoction should be used, which is also to stop sweating. One medicine has two uses, does it match the meaning of "Compendium of Materia Medica"? "Compendium of Materia Medica" says that cinnamon is pungent, sweet and hot, and can promote the flow of hundreds of medicines, dredge blood vessels, stop restlessness and sweating, which means that the blood is regulated and sweat comes out naturally. Zhongjing said that in case of Taiyang stroke, the yin is weak and sweat comes out naturally, and the Wei is strong and the Ying is weak, so fever and sweating occur. He also said that Taiyang disease Heat-induced sweating means that the Ying is weak and the Wei is strong. When the Yin is deficient, the Yang must be combined, so cinnamon twigs are used to induce sweating. This is to regulate the Ying Qi, so that the Wei Qi will be in harmony, and the wind evil will have no place to stay, so the patient will sweat and be relieved. It is not that cinnamon twigs can open the pores and induce sweating. People who sweat a lot use cinnamon twigs to regulate the Ying and Wei, so that the evil will come out through sweating and the sweating will stop. It is not that cinnamon twigs can close the sweat pores. Ignorant people do not know the meaning of sweating and stopping sweating, and they also use cinnamon twigs for patients with colds and no sweating. This is a big mistake. The word "inducing sweating" in cinnamon twig soup should be read as "inducing sweating", and sweat will come out naturally, not like ephedra can open the pores and induce sweating. When treating spontaneous sweating, one should also understand its meaning in reverse."
 "Compendium of Materia Medica Yanyi Buyi" states: "Zhongjing used cinnamon twigs to treat the exterior, not to replenish the exterior when it was weak; if there was wind evil in the Wei, the patient would sweat spontaneously, and cinnamon twigs would be used to expel the evil, and when the Wei was in harmony, the sweating on the exterior would stop by itself, not cinnamon twigs that could stop the sweating."
 "Compendium of Materia Medica": "Ephedra is found throughout the skin and fur, so it is good at inducing sweating and dispersing cold evil. The lung governs the skin and fur, so its pungent taste goes to the lung. Cinnamon twig reaches the Ying and Wei, so it can relieve muscle pain and dispel wind evil. The spleen governs Ying and the lung governs Wei, so its sweet taste goes to the spleen, and its pungent taste goes to the lung."
 "Compendium of Materia Medica" says: "Cinnamon twigs can disperse wind and cold, expel external pathogens, induce sweating, stop coughing, and relieve wind pain between limbs. Although its smell is pungent and hot, it belongs to branches and can only disperse between the skin, fur, muscles and skin, and travel to the arms, knees and limbs."
 "Compendium of Materia Medica": "Although both cinnamon twig and thin cinnamon are thin twigs, thin cinnamon, especially with thin skin, seems to have less effect on harmonizing the Ying than twig. In addition, cinnamon is used to treat running pig, because running pig belongs to kidney qi, kidney qi comes out of the bladder, and cinnamon twig enters the foot sun." "Worldly doctors do not understand the essence of cinnamon twig's solid surface, and seem to think that this flavor can replenish the Wei and close the pores. If so, why don't they use ginseng and astragalus? The wind of the four seasons is caused by the qi of the four seasons. The cold wind in winter hurts the Wei, and the Wei is affected by the cold wind, so it is not affected by the Ying qi and harmonizes with it, so sweating occurs. Only cinnamon twig is pungent and sweet, which can disperse the cold wind on the surface of the skin and clear the blood vessels, so it is combined with white peony, and the Wei is strengthened to reach the Ying, so that they can harmonize and stop sweating."
 "Ben Jing Feng Yuan" says: "Ephedra expel cold and penetrate the skin and fur, so it is specialized in sweating; cinnamon twig goes up and disperses the surface, penetrates the Ying and Wei, so it can relax the muscles. The common belief is that cinnamon twig cannot be used for colds without sweating, but this is not true. Cinnamon twig is pungent and sweet and dispersing, which is yang. It is also an indispensable medicine for cold damaging the Ying and blood. Ephedra decoction and Gegen decoction are not without it. But cinnamon twig decoction should not be used because the peony in it is sour and cold, which astringes the surface and skin."
 "Changsha Yaojie": "Cinnamon twig enters the liver and circulates blood, runs through the meridians and reaches the health. It is good at relieving wind evil and is the best at regulating wood energy. It raises the clear yang and lowers the turbid yin, relaxes the tightness of the tendons and veins, and relieves the obstruction of the joints. It enters the liver and gallbladder to disperse the depression, greatly relieves pain, dredges the meridians and relieves numbness, and even removes dampness and cold. It can stop the running pig and calm the palpitations."
 "Ben Jing Shu Zheng" says: "All medicines must be studied for their nature and function. Cinnamon twigs can benefit joints, warm meridians and dredge blood vessels. This is its nature. "Su Wen·Yin Yang Ying Xiang Da Lun" says that thick taste can cause diarrhea, thick qi can cause fever, pungent can disperse knots, and sweet can replenish deficiency. Therefore, it can harmonize the pores, dissipate adverse qi, relieve pain and relieve restlessness. This is its function. There are six ways to use it: harmonizing the circulation, promoting yang, promoting diuresis, lowering qi, removing blood stasis, and tonifying the middle. Its greatest function and the widest application are none other than Guizhi Decoction, and its first function is to harmonize the circulation."
 Zhang Shouyi: "Cinnamon twigs are used lightly at 3, 5 to 7, 8 fen, and heavy at 1 to 1.5 qian. If the Ying and blood are weak, and the Wei Yang is also weak, and there is a cold outside, use 1 or 2 fen and stir-fry with white peony. If the tongue is slippery and without coating, cinnamon and peony must be stir-fried together, and cinnamon twigs are removed. Only its qi is taken, and its taste is not eaten. Although this is a new method in Wuxia recently, it cannot be said that it has no profound meaning. Cinnamon twigs are the branches of cinnamon, which are tender and thin, fragrant and fragrant, light and rising, and have a pungent and warming taste. It can dispel the wind and cold of Ying and Wei. , treats headaches caused by sunstroke. It can establish the Yang Qi of the Central Plains, and treat abdominal pain caused by spleen and stomach deficiency. It is suitable for unblocking the meridians and reaching the shoulders and arms. It is warm and pungent, which overcomes water, so it can suppress and lower the kidney Qi, calm the running pig, and relieve the numbness of the kidney. If the Yang is weak and the urine is short, it is a good material for urination. However, if it is used in case of dry cough and rising qi, it will cause blood overflow, or if it is used in case of yin deficiency and fluid depletion, it will make the disease worse. Its effect lies in the skin, but Zhongjing's book removes the skin, which can make us realize the error of copying. Without the skin, it is wood, but in recent years, some people may use the wood, which is not a biased hobby. "
 Cao Jiada: "Cold and dampness accumulate in the muscles, and Yang Qi cannot reach the outside. Master Zhong therefore created the Guizhi Decoction to support the spleen Yang and relieve the stagnation of the Ying. The Sun vessels are all over the pores. Cold is stagnant in the muscles, and the Sun vessels are blocked. Without Yang Qi to unclog them, the remaining fluid in the Ying cannot be evaporated and become sweat. Guizhi's ability to develop spleen Yang is its natural function. If this is not treated, the dampness will penetrate into the joints, causing joint pain; or it will penetrate into the Sun vessels and cause pain, and you can't tell where it is when you press it. This is commonly known as cold and dampness flowing into the tendons. The stagnation involves the liver, and both symptoms are suitable for Guizhi."