2. Herbal tea is a drink made of licorice, Prunella vulgaris, honeysuckle, chrysanthemum, mulberry leaves and other Chinese herbal medicines under the guidance of TCM health preserving theory. Widely popular in Guangdong, Hong Kong and other regions, it has the functions of clearing away heat and toxic materials, promoting fluid production to quench thirst, removing fire and removing dampness, and is suitable for drinking in dog days. But herbal tea can't be drunk in the refrigerator the next day, because the Chinese herbal medicine contained in herbal tea is easy to deteriorate. Even if it is stored in the refrigerator, it may breed a large number of pathogenic microorganisms such as bacteria and viruses overnight, which will not only reduce the efficacy of clearing heat and drying dampness, but also stimulate the gastrointestinal tract and cause adverse reactions such as diarrhea, nausea and vomiting. It is recommended to drink fresh herbal tea every day to avoid discomfort.