Lotus seeds are the mature seeds of lotus seeds of the water lily family, and lotus seed hearts are the green and tender embryonic buds of lotus seeds. The medicinal properties of lotus seed heart are bitter and cold, and its effects are to clear the heart and tranquilize the mind, to transport the heart and kidneys, and to astringently stop bleeding. It is often used clinically to treat the following diseases: 1) to reduce fever and calm the mind, to open the orifices and awaken the mind: often used to treat fever and high fever, delirium; 2) to clear the heart and blood, and to benefit the kidney essence: it has the effect of communicating with the heart and kidney, so it is often used to treat heart trouble, insomnia, forgetfulness, etc. caused by the lack of communion between the heart and kidney, often used in combination with poria, sour date, etc.; 3) to astringently stop bleeding: often used to treat spermatorrhea in men, and banding in women. It is often used to treat men’s spermatorrhea and women’s dysbiosis. Lotus seed heart is bitter and cold, so it is not suitable for patients with spleen and stomach deficiency or yang deficiency in clinical practice. In addition, lotus seed heart is bitter and cold, which tends to dry out dampness and injure yin, so it is also not suitable for people who have both qi and yin injuries in the late stages of fever.