The most common cause of frequent urination, urgent urination and incomplete urination is urinary tract infection, but it may also be due to prostate disease and stones, as follows: 1. urinary tract infection: the above symptoms can occur after infection, more serious infection can also appear to have hematuria, or appear to have back pain, fever and other symptoms, need to carry out routine urine examination to further confirm the diagnosis. 2. prostate disease: if it is a male, it may also be due to prostate disease. The most common cause of prostate disease in young men is prostatitis, serious patients can appear urethral dripping white phenomenon, that is, the urethra outflow of viscous prostate fluid, accompanied by pain. The stones stimulate the bladder to contract frequently, which can lead to frequent urination, urinary urgency, incomplete urination, and in severe cases, there can be significant pain or blood in the urine.