Cinnamomum cassia twig is a traditional Chinese medicine, which is the dry branch of Cinnamomum cassia in Lauraceae. Its taste is pungent, sweet and warm, and it belongs to heart meridian, lung meridian and bladder meridian.

2. The main functions of Ramulus Cinnamomi are sweating, relaxing muscles and tendons, warming meridians, strengthening yang, transforming qi and reducing qi. Can be used for treating wind-cold common cold, epigastric pain, blood-cold amenorrhea, joint pain, excessive phlegm, edema, palpitation, etc.

3. Guizhi is widely used in ancient prescriptions, such as Mahuang Decoction, Guizhi Decoction and Xiaojianzhong Decoction in Treatise on Febrile Diseases. Its main component is cassia twig. Modern pharmacological research also shows that Guizhi has the functions of sweating, antipyretic, analgesic, anti-inflammatory and antiallergic, and its anti-inflammatory component is mainly the volatile oil of Guizhi.

In addition, cassia twig has a calming effect and can help sleep. Ramulus Cinnamomi also has certain functions of resisting pathogenic microorganisms and inhibiting bacteria and fungi. In addition, in the aspect of cardiovascular system, modern pharmacological research also shows that microcirculation can be improved. It should be noted that cassia twig is pungent and hot, so pregnant women and those with menorrhagia should use it with caution.