I have a burn when i urine and it remains for an 30 min?

Burning urination: the source of the burning could be a urinary tract infection, or a biochemical abnormality that increases the acidity in your urine. You need to see a urologist, and have a urinary analysis and culture performed.

Dysuria: This symptom is characteristic of inflammation or infection in the lower urinary tract. It could be in the urinary bladder, urethra or prostate. Has there been recent intercourse with a partner whose sexual health status is unknown? If so get examined and appropriate testing by your physician,at a clinic or by a urologist and mention whether here has been recent risky sexual activity.