Lotus seed cores are effective in clearing the heart, removing heat, stopping bleeding, and astringing sperm. In clinical practice, they can be used to treat heart trouble, insomnia, thirst, vomiting of blood, male impotence, seminal emission, slippery sperm, and red, swollen, painful eyes caused by fire. The unique feature of lotus seed cores is that they have a very strong calming effect, which is particularly effective for insomnia caused by stressful work and poor mental state. For the more common hypertension and coronary heart disease, the relevant symptomatic disposition can also be carried out. The lotus seed core has an astringent and astringent effect, so it can be used to regulate symptoms related to spermatorrhea and other symptoms that occur in men, and can improve sexual function.