Cinnamon alone in water is usually effective, with the effect of tonifying fire to help yang (replenishing yang qi in the body), warming the meridians and opening up the veins, etc. It is recommended that patients follow the doctor’s instructions to standardize the use of medication. Cinnamon belongs to the warming herbs, with the effects of tonifying fire to help yang, drawing fire back to the source (inhibiting the fire of the kidneys from rising), treating spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys) certificates, vital fire failure (weakness of kidney yang in the body, with a reduced function of warming and promoting the movement of qi and blood) certificates, etc.; it also warms the middle warmer to dissipate the cold (dispersing cold evils by warming the spleen and stomach with medicines), and is good at relieving coldness of the spleen and stomach (spleen and stomach weak and cold) cold and pain. In addition, it can also warm the meridians, dissipate cold and relieve pain (relieve pain by dispelling cold in the body), treat wind-cold-dampness paralysis (paralysis of the limbs caused by the three evils of wind, cold and dampness invading the human body), and thoracic paralysis (stuffy pain in the chest) and other conditions. Cinnamon can usually be brewed alone and is usually effective in treating the above diseases, but the effective dosage of brewing alone is limited, resulting in a possible lack of effectiveness in taking it, and it is recommended to pair it with medicines such as Pseudostellariae, Gan Ginger, and Cinnamon Zizip in order to enhance the efficacy. Cinnamon is hot and pungent and consumes yin to move blood, so it is contraindicated for people with yin deficiency and fire (deficiency of yin and essence in the body, and hyperactive fire), and caution should be exercised for people with bleeding tendency and pregnant women, and it should not be used with chrysoprase. It is recommended to be taken under the guidance of a traditional Chinese medicine practitioner, and should not be used in combination with red stone resin during the period of medication, and pregnant women should be used with caution.