Its difficult to answer without knowing you age and sex as the diagnosis vary with age and sex. Anyway you are having burning sensation when you pass urine. Most common cause in any age group is urinary tract infection
. Get your urine examination done to look for signs of infection. also get ultrasound
of the abdomen to look for any bladder stones. If you are a male prostatitis
could be the cause. Visit a urologist
and you need a thorough examination and investigation.