hello, My 3yr and 3month old son applies little pressure while passing urine, only little pressure and no crying at all. . and he is not passing continuously.. he applies pressure and passes some amount of urine.. after sometime may be 15minutes, he applies pressure and passes some amount of urine. Once I have seen him passing some and stopping and then passing some.. Otherwise he is playful and active enough whole day..Is there a problem?? please advice..