Lock yang can be brewed as tea, but brewing is not the correct way to use it, it should be decided by a Chinese medicine practitioner after diagnosis and treatment to be decocted in water or put into pills or bulk. Lock yang has a sweet taste and warm nature, it is the name of the Chinese medicine, it has the effect of tonifying kidney yang, benefiting the essence and blood, and it can moisten the intestines and laxative; lock yang is useful for impotence and spermatorrhea caused by kidney yang deficiency (yang qi deficit of the kidneys), and it can also treat impotence and weakness of the waist and knees and constipation of the intestinal dryness and constipation, etc.; lock yang can be brewed in tea and drank, but the use of the active ingredients in the brewing water is limited, and it usually needs to be boiled correctly in order to achieve the therapeutic effect. The adverse effects of lock yang are not exact; it is contraindicated for those with spleen deficiency and diarrhea (diarrhea caused by weak spleen function), and should not be used by patients with solid heat constipation. Before using Chinese medicine lock yang, please ask a Chinese medicine practitioner for identification and follow the doctor’s instructions.