Difficulty in urination is a symptom, including weakness in urination, thin urine line, interruption of urination, inability to urinate, etc. In the lighter cases, it is manifested as delayed urination and short range; in the heavier cases, it is manifested as thin urine line, dripping urine stream and no line, and even need to hold the breath and exert force when urinating, or even need to press the lower abdomen by hand to get the urine out, and serious difficulty in urination can develop into urinary retention. It can be caused by mechanical reasons, such as: prostatic hyperplasia, bladder and urethral stones, tumors of the bladder and urethra, urethral strictures, urethral valves, etc.; it can also be due to dynamic reasons, such as: neurogenic bladder, after anesthesia, spinal cord diseases (including malformations, injuries, tumors, etc.), complications of advanced diabetes mellitus, etc.; some urinary difficulties can be caused by both of these reasons. For example, in the case of prostatic hyperplasia, the early stage can cause obstruction due to the enlarged prostate and cause difficulty in urination, if not treated in a timely manner, it can lead to damage to the bladder forced urinary muscle at a later stage, causing power urinary difficulty, which should be further diagnosed and treated symptomatically.