Drinking tea in moderation is harmless to kidneys; if you drink a lot of tea may cause kidney stones, aggravate the burden on the kidneys and cause some damage to the kidneys. Drinking tea in moderation is harmless to the kidneys. Tea contains caffeine, vitamins, tea polyphenols and other substances, which can increase the urinary excretion of the kidneys, and at the same time, it can replenish a variety of vitamins and minerals, so drinking tea in moderation is harmless to the kidneys. However, if you drink a lot of tea, for patients with poor kidney function, it may cause increased water load, resulting in edema, hypertension, and even affect cardiopulmonary function. At the same time, tea contains more oxalic acid, if you often drink a lot of tea, it is easy to form oxalate crystals, deposited in the kidneys to cause the occurrence of stones. Drinking tea can be, but in moderation, it is recommended that you should drink tea regularly, avoid drinking strong tea, avoid drinking tea at night, if the discomfort occurs, you need to seek medical attention as soon as possible, to clarify the cause of the disease, symptomatic treatment.