How is urine weakness caused?

A lot of people say I always feel when urinating not clean. Just finished the toilet, after a while and want to go. What is going on? This phenomenon in clinical we call it not enough urine. Generally is a typical symptom of urinary tract infection. Is also one of the main urinary manifestations of prostatitis. He means that patients always feel urination suffocating, but after urinating suffocating feeling still can not be lifted. Then if the urine is not clean, accompanied by frequent urination, urinary pain, may be caused by urinary tract infection, need oral anti-inflammatory drugs. If the elderly patient urine is not clean, accompanied by urine is now fine, urination difficulties and other manifestations. May be because of prostate hyperplasia, which is often said to be caused by prostatic hypertrophy, need oral tamsulosin and other drugs to improve symptoms.