Calamus generally refers to calamus, which can be used as a traditional Chinese medicine, mainly has the effect of opening the orifices and expelling phlegm, awakening the spirit and benefiting the intellect, resolving dampness and opening up the stomach (through the elimination of dampness so that the gastrointestinal function can be normalized), and can be used in the treatment of fainting and epilepsy, forgetfulness and insomnia, and epigastric plumpness and lack of hunger, and does not have any clear side effects. Acorus calamus is the dried rhizome of Acorus calamus, a plant of the family Tennantaceae, which is pungent, bitter and warm in nature, and has the effects of opening the orifices and clearing away phlegm, awakening the mind, dissolving dampness and opening up the stomach, etc. It can be used in the treatment of somnambulism and epilepsy, forgetfulness and insomnia, tinnitus and deafness as well as dampness obstruction in the middle Jiao (the dampness obstructing the function of the spleen and the stomach), epigastric platitude (the stomach is distended and uncomfortable), bloating and pain, and loss of appetite, etc. It has no clear side effects. Calamus has no clear side effects, but its nature is warm, so solid heat within the blaze or yin deficiency fire (Yin essence deficiency in the body, the emergence of deficiency fire exuberance), blood deficiency and blood heat should be avoided to take a single flavor, in order to avoid adverse effects on the condition. In addition, calamus pungent and dry, there are injurious to the disadvantages of fluid depletion, so the yin and blood deficiencies should also be avoided, the specific use should also be under the guidance of the physician’s diagnosis.