Lotus root is the hypertrophy rhizome of lotus, which is a kind of common food. Chinese medicine believes that raw lotus root is sweet and cold, which has the effects of removing blood stasis and clearing heat, quenching thirst, stopping bleeding (nosebleed, hematuria, hematochezia and uterine bleeding). "Daily Materia Medica" holds that "all blood syndromes should be eaten". Blood syndrome here includes hematemesis and hemoptysis. In other words, lotus root is good for all diseases that show bleeding. Women are more prone to "blood syndrome" because of their special physiological functions. Therefore, eating more lotus roots is especially beneficial to women. Because the lotus root is cold, it is easy to interfere with the spleen and stomach. Therefore, people with low digestive function of the spleen and stomach and loose stools should not eat it raw. In addition, parturient should not eat raw lotus root too early, and it is advisable to eat it after1-2 weeks after delivery. After the lotus root is cooked, its nature changes from cool to warm, and it loses the function of removing stasis and clearing heat, but becomes beneficial to the spleen and stomach, with the effects of nourishing stomach, nourishing yin, benefiting blood and stopping diarrhea, which is suitable for all kinds of people to eat.