Thanks for the query.
If you have pain, blood in urine then the common possibilities are infection, stone or obstruction.
All of these conditions are seen at all age groups.
Thus you need to do a urine culture which will confirm or rule out infection.
Also an ultrasound
is absolutely essential as it can tell if there are underlying stones or obstruction.
See a nephrologist
who will do further tests to determine why you have these problems.
Hope this helps.