What could cause trouble urination?

Many possibilities.: Trouble with urination can be grouped into disorders of the bladder's ability to expel urine or obstruction of the outflow tract. Bladder problems include muscular disorders, diverticuli, diabetes, & neurologic problems. The most common cause of obstruction in men is an enlarged prostate, but strictures and blockage by stones can occur. If you're having difficulty, i recommend you see a urologist.