Cordyceps is a traditional Chinese medicine that does not usually produce side effects when taken correctly, but may cause precocious puberty in children. Cordyceps, as a valuable Chinese medicine, is flat and sweet in nature, and enters the lung and kidney meridians. Its main effect is to stop bleeding and resolve phlegm, tonifying the kidney and benefiting the lungs. Cordyceps sinensis is mainly used to treat impotence and spermatorrhea, kidney deficiency and seminal deficiency, lumbar and knee pain, coughing and haemoptysis, and prolonged coughing and wheezing. However, if teenagers and infants take Cordyceps for a long time, it is easy to cause the body to have precocious puberty. For cold and fever should not take cordyceps, otherwise it will aggravate the symptoms of cold, because the body is in the period of feeling the external evil, and the tonic nature of cordyceps is not conducive to the dispersal of the external evil, thus aggravating the symptoms of cold. In addition, those who are allergic to Cordyceps Sinensis are forbidden to take Cordyceps Sinensis, and the taking of Cordyceps Sinensis should be carried out under the guidance of doctors.