There are a few possible reasons why you may experience burning when urinating but don't have a urinary tract infection (UTI). One possibility is that you have interstitial cystitis, which is a chronic inflammation of the bladder. Another possibility is that you have urethritis, which is an inflammation of the urethra. Additionally, your burning could be caused by sexually transmitted infections (STIs) such as gonorrhea or chlamydia. finally, it's also possible that you're simply having a reaction to a new soap or detergent that you're using. If the burning persists or gets worse, it's important to see a doctor so they can rule out any serious underlying causes.