The functions of Tiannanxing are to dissipate knots and swellings, dispel wind and stop spasms (treating symptoms such as spasms by dispersing wind), and dry dampness and resolve phlegm (expelling dampness and resolving phlegm by drying dampness). Tennant star has some toxicity, if not used properly, toxic reactions may occur and jeopardize health. Tennyson is the dried tuber of Tennyson, Heterophyllum or Northeastern Tennyson, which has the efficacy of dispersing knots and swelling, dispelling wind and relieving spasm, drying dampness and resolving phlegm, and can be used to treat carbuncles and swellings (a symptom of localized swelling caused by congestion of the qi and blood by evils and poisons), snake and insect bites and other illnesses. However, it has a certain degree of toxicity, and if patients use the medicine without authorization and inadvertently cause toxic reactions, it may damage their health and is not conducive to disease recovery. For Yin deficiency and dry phlegm, as well as pregnant women should be contraindicated to take Tiannanxing. Patients in the use of Tiannanxing period, if the body abnormal discomfort, it is recommended to consult a doctor in a timely manner, for relevant examination. The specific use of the drug must be under the guidance of a professional physician.