A friend of mine has a 4-year-old child who still wets the bed at night, and the friend is very worried. They want to take the child to the hospital for a check-up but are unsure which department to visit. This situation is known as enuresis, which refers to children over the age of 3 who cannot control their urination while sleeping and consequently wet the bed involuntarily. Chronic enuresis can weaken children, affecting their physical health and intellectual development. The first step should be to have a medical examination. You can bring the child to either the pediatric department or the urology department for a check-up to rule out any underlying diseases. After a thorough examination, treatment can be administered accordingly. For this condition, it is advisable to take the child to either the pediatric department or the urology department. Generally, a detailed physical examination and relevant auxiliary examinations are required to confirm the condition before adopting targeted treatment measures. Additionally, proper child care should be maintained at all times. Avoid giving the child too much water before bedtime and ensure they do not get too tired during the day.