Bedwetting in children at night is common in the following situations: 1. over fatigue or excitement, excessive activity before the baby goes to sleep, making it fatigued or excited, and it is easy to fall into deep sleep and slumber after sleep, leading to bedwetting. 2. drinking too much water before bedtime, let the baby drink less water before going to sleep, or try to eat food containing less water for dinner. 3. small bladder capacity or flaccid urinary muscles, both can lead to frequent bedwetting and more urination during the day.4. Diseases such as occult spina bifida.5. Enuresis, mostly seen in babies over 5 years old, bedwetting intermittent time never exceeds 6 months, then we should pay attention to the possibility of enuresis in children, we should go to the hospital in time to give the necessary diagnosis and treatment.