Cinnamon and cinnamon sticks are the same thing, both pungent, sweet and warm in nature, can disperse cold and relieve pain, warm through the meridians, with the treatment of cold and blood stagnation of the chest paralysis (chest pain), amenorrhea, menstrual cramps, wind, cold and damp paralysis. Cinnamon is the bark of the tree trunk, strong and specialized in the work to go. It is hot and enters the kidney, spleen, heart and liver meridians. It is long in warming the inner cold, used to treat the inner cold; it can also tonify the fire to help Yang, lead the fire back to the source (inhibit the fire of the kidneys to rise), used to treat the impotence of impotence and coldness of the uterus in the absence of kidney yang and fire failure of the life gate (the body of the kidney yang is weak, and the function of warming and promoting the function of the operation of qi and blood is lowered), the deficiency of the lower element, asthma, palpitations and so on. It should be used with caution in cases of yin deficiency and fire exuberance, solid heat inside the body, bleeding tendency and pregnant women. It should not be used with red stone resin. Gui Zhi is the young branch of the tree, which is slow in force and goes into the couper (pores). It is warm in nature and goes to the heart, lung and bladder meridians. It is good at relieving surface and dispersing cold (removing cold from the muscle surface), treating wind-cold surface syndrome; it can also help Yang to transform Qi, treating phlegm-drinking syndrome (pathological products formed by impaired metabolism of water and fluid), etc. It is also useful in treating the symptoms of external heat, yin deficiency and fire. It is contraindicated in cases of exogenous fever, yin deficiency and fire exuberance, and blood-heat paranoia (heat evil causing blood to go out abnormally). Pregnant women and those with excessive menstruation should be cautious. The drug should be used in a standardized manner under the guidance of a professional Chinese medicine practitioner’s diagnosis, and should not be taken on its own to avoid risks.