It is possible that the child’s frequent bedwetting at the age of 4 is caused by congenital diseases such as congenital sacrococcygeal spina bifida, which requires a detailed examination by a doctor, such as a positive and lateral sacral spine film, to give further guidance and treatment according to the actual situation of the child. If the child wets the bed only once in a while, it may be because the nervous system is not particularly well developed, especially in the daytime or within 2 hours before bedtime, excessive excitement and activity, after going to sleep, the child may cause bedwetting because the cerebral cortex has not returned to the normal level, parents do not need to worry, there is no problem. It may also be because parents have not given their children the habit, which is also not normal, and need to be regulated in life, reducing the amount of water drunk at night, at dinner, and before bedtime, especially within 2 hours before bedtime as much as possible. Parents should wake their children up at a fixed time after going to sleep at night for urination habit formation, and the child’s symptoms can gradually return to normal.