Bedwetting in a woman in her 30s may be caused by physiological factors such as drinking too much water and mental stress, or it may be caused by uremia, overactive bladder, and other diseases such as urethritis. 1. Physiological factors: a woman in her 30s who drinks a lot of water before going to bed or who is under too much mental stress before going to bed may show signs of bedwetting. This is a normal physiological phenomenon, do not need to be treated, generally reduce the amount of water before going to bed and mental relaxation after bedwetting symptoms will improve. 2. Uremia: Uremia is considered to be caused by argipressin deficiency, renal insensitivity to argipressin and other factors. Patients will have a large amount of urination, extreme thirst, drinking a lot of water and other manifestations. If a woman in her 30s develops enuresis, it may manifest as bedwetting. 3. Overactive bladder syndrome: the etiology of overactive bladder syndrome is still unclear, and it is considered to be related to the underdevelopment of urinary function, nerve center and neurotransmission abnormality and other reasons. Patients will have frequent urination, nocturia, urge incontinence and other symptoms, so women in their 30s with overactive bladder will have symptoms of bedwetting. 4. Other: women in their 30s with urethritis, diabetes mellitus, spinal cord embolism syndrome, occult spina bifida will also have symptoms of bedwetting.