The most common causes of urinary dribbling: 1, urinary tract infection, infection due to urethral mucosa congestion and edema, urethral resistance increases, then there can be urinary dribbling, accompanied by frequent urination, urinary urgency and other symptoms. Need to carry out routine urine examination to further clarify whether there is a urinary tract infection. 2, male prostate hyperplasia, is also a common cause of urinary dribbling. Due to prostate hyperplasia, the gland protrudes into the bladder cavity, urethral cavity caused by the relative narrowing of the urethral lumen. At this time there is an increase in the resistance to urination, there will be the phenomenon of urine dribbling, which can be accompanied by urinary effort, urinary diversion or urination can not be formed into a line, serious patients may even be unable to urinate. Need to carry out ultrasound examination of the prostate, to rule out the existence of prostate hyperplasia. 3, urethral calculi can also appear urine dribbling, accompanied by pain in the urethra, bleeding in the urethra or blood in the urine and other symptoms. It can also be accompanied by urinary effort, urinary diversion or the presence of stones completely obstructing the urethra, and the inability to urinate. Urethroscopy is needed to rule out the presence of urethral stones.