It must be a UTI or maybe some dehydration.
When lab tests show no infection but the bladder still feels inflamed, irritated, or burns during urination, it may not be a passing problem. This irritation without infection is sometimes the body’s reaction to cancerous cells developing in the bladder lining.
An article on the subject points out that bladder cancer can mimic urinary tract infections (UTIs), a reason why misdiagnosis is common, especially in women. A UTI that doesn’t respond to antibiotics might not be a UTI at all.
[This article is meant for informational purposes only and should not be used as a substitute for professional medical advice. If any of these symptoms persist or cause concern, a qualified healthcare provider should be consulted for proper evaluation and diagnosis.]