Cinnamon is pungent, sweet and hot, and has the function of tonifying fire and strengthening yang, inducing fire to return to the source, dispersing cold and relieving pain, and promoting blood circulation and menstruation. First of all, it can be used to treat patients with spleen and kidney yang deficiency, which is manifested as fatigue, fear of cold and cold limbs; some patients can also be manifested as edema of the lower limbs, and at the same time, it is manifested as loose stools, or even a few times a day, and this kind of patient’s tongue is pale, and the tongue moss is white, and the pulse is dull and thin; males can be manifested as impotence, and females can be manifested as uterine cold. It can also be used to treat pain caused by cold, which is often severe and occurs when there is cold. For women, it can also treat menstrual disorders caused by uterine cold as well as dysmenorrhea, which often leads to menstrual cramps and more severe pain. At the same time, modern medicine has confirmed that cinnamon contains cinnamon oil itself also has a certain role in improving microcirculation, can treat coronary heart disease, cerebrovascular disease and hypertension and so on. For many chronic diseases is a certain benefit, this is some of the efficacy and role of cinnamon.