Im 20, 5'8" and 10st and fit and healthy with no previous medical problems.
Some times, only in the mornings after just waking up, if i have a morning erection and go for a pee, sometimes even when I let it go down I will pee fine untill then end of the pee when it will become uncomfortable and have much darker coloured dribbles of pee, then for the next hour or so i will have a constant urge to pee and it will be painfull when i do just coming out in small amounts. This doesnt happen all the time every other month maybe.