Hello, the efficacy of cinnamon is to replenish the fire to help the sun, dispersing cold pain, blood circulation through the menstruation, used for lumbar and knee cold pain, red eyes and sore throat, cold pain in the heart and abdomen, etc., and its contraindications for hemorrhagic tendencies, pregnant women should be used with caution, etc., serotonin disease, that is, the lack of glucose 6 phosphate dehydrogenase in the erythrocytes, also known as G6PD deficiency. Anti-malarial drugs, sulfonamides, antipyretic and analgesic drugs should be prohibited, Chinese medicine, such as peppermint, camphor, Sichuan lotus, Lap-mei flower, open tea, seven centigrade can not be eaten, you can also face to face to consult with the old Chinese medicine. I hope to help you.