Sudden bedwetting in adults may be related to arousal disorders, epilepsy, prostate enlargement, etc. For specific cases, it is necessary to go to regular hospitals for medical treatment to clarify the causes. 1. Arousal disorder: Arousal dysfunction is an important cause of enuresis, such as bladder filling and contraction, sensory insufficiency or excessive fatigue can cause deep sleep, resulting in arousal dysfunction. 2. Epilepsy: Adults with a history of epilepsy are prone to convulsions, impaired consciousness, urinary incontinence and bedwetting during epileptic status quo or seizures, etc. They should be regulated under the guidance of a doctor to prevent and control complications and so on. 3. Prostatic hyperplasia: Prostatic hyperplasia compresses the urethra due to its increased size, which can cause the symptoms of urinary incontinence, thus leading to the occurrence of sudden bedwetting in adults. Sudden bedwetting in adults may also be caused by other factors, and should be taken seriously, and promptly go to the regular hospital for medical treatment.