Overnight chrysanthemum tea is not recommended. Because overnight chrysanthemum tea due to chrysanthemum soaking time is too long, may lead to the loss of nutrient content, but also lead to taste deterioration, there is a bitter phenomenon, and chrysanthemum tea at room temperature for a long time may also produce bacteria, deterioration, easy to lead to diarrhea. Chrysanthemum is a medicinal ingredient. According to Chinese medicine, chrysanthemum, sweet, bitter and slightly cold in nature, belongs to the lung and liver meridians. It has the effects of clearing heat and detoxification (removing heat and toxicity from the body), dispersing wind and clearing heat, calming the liver and brightening the eyes. It is used for wind-heat cold, headache and dizziness, redness and swelling of the eyes, dimming of the eyes, sores, carbuncles and poisons. Chrysanthemum tea is limited, it is difficult to achieve the above effects, it is recommended to follow the doctor’s instructions for medication. In addition, chrysanthemum tea should be consumed in moderation and with the brewing of drink, to avoid a long time.