Cinnamon bark is pungent and warm in Chinese medicine, which can warm the spleen and stomach, the waist and kidneys, and also has the effect of activating blood circulation. Firstly, it can treat cold pain in the stomach and epigastrium, loss of appetite, loose stools and indigestion caused by deficiency cold in the spleen and stomach. Such patients often have a pale tongue with white fur. In addition, it can also be used to treat coldness of the extremities, edema of both lower extremities, dizziness and tiredness caused by deficiency of the spleen and kidney, and the pulse of such patients is often sunken and fine. In addition, it can also be used to treat redness and pain of local joints or skin muscles caused by bruises. Modern pharmacological research found that the volatile oil contained in cinnamon bark itself has insulin-like effects, which can help diabetic patients control blood sugar, and also increase the sensitivity of fat to insulin, which can help patients effectively control blood sugar. At the same time, the volatile oil contained in cinnamon bark also helps patients to improve appetite and promote gastrointestinal motility, which can help patients to improve the symptoms of indigestion. These are some of the efficacy and effects of cinnamon.