Question: what is it when you feel like you have to pee but can't?
Answer: Urinary Tract Infection (UTI) You can develop a UTI when bacteria get into any part of your urinary tract (bladder, urethra, and kidneys). When you have a UTI, it may burn when you pee. You might feel like you have to go more often. Also, the urge to pee may come on suddenly, but only a little urine comes out.