Pu-erh tea is generally not harmful to the human body when consumed in moderation, but if consumed in excess over a long period of time, it may cause discomfort due to excessive caffeine intake. Pu-erh tea is a common beverage in daily life, which contains a small amount of catechins, chlorophyll, β-carotene and other components, these substances can provide nutrients for the human body, moderate consumption is generally not particularly harmful. Pu-erh tea also contains caffeine, which tends to stimulate the central nervous system, causing the brain to be in a state of euphoria, and may affect sleep if consumed in excess over a long period of time. If you are allergic to Pu-erh tea, you need to prohibit drinking it to avoid inducing allergic reactions such as diarrhea, rashes and skin itching.