The waiting for urine, it is recommended to go to the hospital for further examination to clarify the possible causes, common causes include: 1, male prostate hyperplasia, with age, the prostate gland volume increases will cause a urethral obstruction, urinary resistance increases patients will have to wait for urination or urinary weakness symptoms. If the degree of prostate hyperplasia further aggravation, can cause a complete occlusion of the urethra, then there can be difficult or unable to urinate, need to go to the hospital for ultrasound examination of the prostate to clarify.2, bladder muscle contraction weakness, common in neurogenic bladder, such as dominant bladder contraction of nerve dysfunction, the common diseases include cerebral hemorrhage, cerebral infarction, spinal cord injury, and so on. Then the patient will have to wait for urine, urinary weakness, and even can appear to have the bladder forced muscle does not have any contraction, resulting in the patient can not urinate. 3, acute urinary tract infection, urethral stones or urethral polyps, etc., can cause different degrees of urethra blockage. At this time, there can be waiting for urine, urinary weakness, may be accompanied by frequent urination, urinary urgency or with the phenomenon of urinary bleeding, need to carry out urethral laboratory tests, urethroscopy, etc. to clarify.