Chrysanthemum tea has the effects of clearing heat and purging fire, clearing liver and improving eyesight. Because of its bitter and cold nature, people with physical weakness (yang deficiency) should not drink more. Chrysanthemums used for both medicine and food are all cultivated artificially, and can be divided into Hangzhou Chrysanthemum, Chu Chrysanthemum and Bo Chrysanthemum due to different places of origin. Chrysanthemum indicum is wild, growing on roadsides, hills, wasteland and hillsides, and distributed in most parts of the country. Chrysanthemum indicum is effective in preventing and treating epidemic cerebrospinal meningitis, influenza and snake bite. White chrysanthemum is sweet in taste, poor in heat clearing ability, good in calming the liver and improving eyesight, while Huang Juhua is bitter in taste and strong in heat clearing ability, and is often used to dispel wind and clear heat. Chrysanthemum is not only a traditional Chinese medicine, but also a health care product with little toxic and side effects. Flos Chrysanthemi Indici tastes bitter and cold. Long-term or high-dose use will hurt the yang of the spleen and stomach, resulting in stomach discomfort, loss of appetite, bowel sounds, loose stool and other adverse reactions. Not suitable for people with weak spleen and stomach and pregnant women. Therefore, chrysanthemum and wild chrysanthemum can not be confused when used, and can not replace each other. People with cold stomach and pale face can't eat chrysanthemums. For other healthy people, eating chrysanthemum once or twice a day, three to five grams each time is enough. Chrysanthemum tea cannot be drunk for a long time. Do not drink chrysanthemum tea continuously for more than two months. If the stool becomes thin and pale during this period, it should be stopped.