Fire is a folk saying, belongs to the category of internal heat in Chinese medicine, drinking black tea generally does not cause internal heat, you can drink in moderation, but avoid excessive drinking. Chinese medicine nutritional science, black tea is warm, can warm the spleen and stomach, smooth the middle Jiao. Drinking it moderately will not cause internal heat, but you should not drink it excessively. Black tea belongs to a kind of fully fermented tea, which contains a variety of nutrients, such as phosphorus, magnesium, potassium, carotene, lysine, alanine, aspartic acid and so on, so drinking black tea has a certain nutritional value to the body. So black tea can be drunk, but pay attention to moderation.