If it is a child who suffers from urine loss, it is mostly caused by too much sleep. If it is an adult, it may be due to genetic factors, urethral injury, urethral stenosis, lower urinary tract obstruction, prostate hyperplasia and other reasons. 1. Deep sleep: If it is a child who sleeps and urinates, most of the time it is caused by deep sleep. 2. Genetic factors: enuresis is hereditary, and most patients have parents or relatives who have had similar symptoms, so there is a genetic predisposition. 3. Urethral injuries: Urethral injuries can lead to sphincter tears, which are usually manifested as enuresis during sleep. 4. Urethral stenosis: When urethral stenosis occurs, if there is too much urine left in the bladder, and when the enlargement gradually progresses to a qualitative degree, a large amount of urine will be retained in the bladder, leading to urinary incontinence and enuresis. 5. Lower urinary tract obstruction: when the lower urinary tract obstruction is more serious, urine retention may occur, and the patient will experience filling incontinence. 6. Prostatic hyperplasia: mainly due to prostatic hyperplasia after the constant pressure on the male bladder, resulting in urethral narrowing, bladder capacity becomes smaller, over time, resulting in the bladder does not have the ability to contract, the phenomenon of sleep loss of urine may occur. Patients who have the phenomenon of sleep loss of urine, need to go to the regular hospital as soon as possible for relevant examination, identify the cause of the disease and then actively treatment.