Cinnamon is a Chinese herb also called cinnamon bark. Cinnamon is pungent, sweet and very hot. It belongs to the kidney, spleen, heart and liver meridians. Its effects are warming the middle and dispersing cold (dispelling cold with medicine that warms the spleen and stomach), invigorating the blood and promoting menstruation, regulating qi and relieving pain (relieving pain by unblocking qi), and tonifying fire and helping yang (replenishing yang qi in the body). Cinnamon is mainly used to treat cold pain in the epigastrium (cold pain in the stomach and abdomen), vomiting and diarrhea, coldness in the waist and knees, cold hernia and abdominal pain (acute abdominal pain caused by coldness in the internal organs and external wind-cold), cold-dampness paralysis and pain, stagnation and dysmenorrhea, bloody diarrhea, intestinal wind, bruises and pains and bleeding from wounds, etc. It is also used in the treatment of appetite and pain, and to relieve pain by warming the spleen and stomach. Cinnamon is suitable for the treatment of loss of appetite, stomach cold pain, postpartum abdominal pain and other people, yin deficiency and fire should not be served, bleeding tendency and pregnant women should not be used, should not be used with red stone resin. Cinnamon as a kind of Chinese medicine, alone can not play out all the efficacy, need to be used with other medicinal herbs. Need to be used under the guidance of a traditional Chinese medicine practitioner, to avoid adverse reactions to self medication.