A 5-year-old child who has not urinated for a day and is not drinking well, with a bulging stomach but no urine, usually needs to consider the possibility of abdominal distension caused by indigestion or kidney function impairment. Bloating caused by food accumulation or indigestion can lead to decreased water intake, decreased urination or bloating. When a child’s digestive ability is weakened or indigestion occurs, it can lead to localized accumulation of stomach contents, which reduces the frequency and volume of water intake, and in turn leads to low urine output. Kidney impairment is also a common cause of these symptoms in children. Children with nephritis, glomerular damage, or kidney failure may also have low urine output. The storage of water and fluids in the body may result in a bulging stomach. A 5-week-old child did not urinate for a day, drinking water is not good, tummy bulge is no urine, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.