I am a 22 year old male and the flow of my urine is not as proper and quick as it used to be. I often see drops of it on my underwear after I have finished urinating. I also feel a little bit pressure on the bladder part whenever I urinate, i. E, the bladder pains a little and then the flow begins. I have had a history with kidney related problem of formation of stones and I have also got it operated once where I was told that I also had hydronephrosis. I would like your advise on what tests should be required (if any), for above symptoms. Thanks!