The child’s urinary routine is fine but urination is very frequent may be related to physiological reasons such as mental stress, drinking too much water, and may also be related to abnormal function of the urethral sphincter. 1. Physiological reasons. When the child’s mental stress, nervousness, or drinking too much water, cold weather, etc., can cause frequent urination, but the general urinalysis is generally no problem, this is a physiological cause. 2. Pathologic causes. Urine routine no problem generally suggests that the urinary tract infection has nothing to do with the urethral sphincter function may be abnormal, resulting in poor urinary control caused by frequent urination. When the child can not relieve frequent urination, should be further examined under the guidance of the doctor, to clarify the cause, in order to actively treat.