Frequent water drinking in a 3-year-old child may be due to physiological factors, urolithiasis, and so on. Different triggers and different treatments, including medication and surgery. 1. Physiological factors: for example, when the weather is hot and sweating is high, children will drink water frequently. The indoor temperature should be adjusted to avoid the children sweating more, and the children’s frequent drinking phenomenon will be improved by themselves, and no special treatment is needed. 2. Uremia: children will also drink water frequently when there is uremia, can choose to apply artificial pressurization, hydrochlorothiazide, carbamazepine and other drugs under the treatment of the doctor for treatment. In the presence of tumor factor, the tumor should also be removed through surgery. During the treatment period, parents must follow the doctor’s instructions and give their children medicines reasonably, do not use medicines indiscriminately.