Lotus seed has the effect of benefiting the kidney and astringent essence, nourishing the heart and tranquilizing the mind, and is mainly used for the treatment of spleen deficiency and diarrhea, palpitations and insomnia. Lotus seed is the mature seed of lotus of the genus Lotus, family Water Lily. It has the efficacy of consolidating essence and stopping the belt, tonifying the spleen and stopping diarrhea, benefiting the kidney and nourishing the heart. It can be used for treating prolonged diarrhea due to spleen deficiency, loss of appetite, seminal emission and spermatorrhea due to lack of kidney qi, seminal emission and slippery semen due to deficiency of the kidneys (the kidneys are unable to store semen due to deficiency of the kidneys) or dysfunctional heart and kidneys (the heart and kidneys are not in harmony with each other, the heart and kidneys are not in harmony with each other), and dysfunctional spleen and kidneys are not in harmony with the kidneys and the heart and kidneys are not in harmony with each other, and hyperemesis is a condition of insomnia due to deficiency of the heart and kidneys and hyperemesis. The adverse effects of lotus seed are not clear. For those with mid-fullness and plumpness and dry stools, lotus seed should not be used to avoid aggravating the condition. During the application of dried lotus seed, patients should pay attention to the rationality of diet, not to intake of cold, spicy and stimulating food, so as not to affect its efficacy. It is recommended that patients use lotus seed after medical diagnosis, and should not use it on their own, so as not to delay the condition.