The behavior of dreaming of bedwetting at the age of 21 is related to sleeping too heavily, drinking a lot of alcohol, drinking more water, and dreaming too heavily at night. Occasional occurrence of bedwetting in dreams once in a while is a normal phenomenon and will not pose a serious danger to the body. However, if bedwetting occurs frequently, you need to go to the hospital for relevant examination and treatment in a timely manner. You can consider whether there is bladder sphincter relaxation and other conditions, and it is also recommended to do a spinal MRI examination to clarify whether the patient has spina bifida, spondylolisthesis, etc., and then carry out symptomatic treatment.