If a child is still wetting the bed at the age of four, in addition to seeking prompt medical attention to check whether the problem is caused by an organic disease and treat it accordingly, it is important to first adjust the work schedule and not to do too much exercise during the day to avoid overworking the child, and when the child is sleeping, parents can wake the child up in time to allow the child to urinate at night, and to control the amount of water drunk before bedtime, drinking as little as possible.