May have urinary tract infection.
Get a urine examination done.along with USG KUB .proper treatment is only after proper diagnosis.
For burning in urine,alkalisation of urine gives relief .
For sympotamatic treatment only can mixed 1tsf baking soda with 2 TSF
sugar in glass of water to be taken ,thrice daily.
Alternatively market preparations of alkaline solution for the purpose available.popular brand alkasol 3tsf mixed with glass of water thrice daily.