Leakage of urine at night in 8-year-old children may be caused by physiological factors, urinary tract infection, neurogenic bladder and other factors. 1. Physiological factors: children who play excessively during the day and are physically tired will leak urine at night. If it occurs only occasionally and has no other clinical manifestations, no special treatment is needed. 2. Urinary tract infections: children who drink too little water and do not pay attention to the hygiene of the lower body may be induced by urinary tract infections, such as cystitis, which in severe cases can induce urge incontinence, and then leakage of urine at night, which may be accompanied by urinary frequency, urgency, urinary pain and other symptoms. 3. Neurogenic bladder: related to a variety of factors, such as brain tumors, traumatic brain injury, diabetes mellitus, can lead to severe damage to the nerves innervating the bladder, will leakage of urine at night, may also have difficulty urinating, urinary retention. Nighttime urinary leakage in 8-year-old children may also be caused by other factors. If the symptoms persist and physiological factors are ruled out, parents are advised to take their children to regular hospitals for treatment and early recovery.