Burning or pain when you urinate
Needing to urinate often
Feeling an urgent need to urinate
Passing only small amounts of urine
Cloudy urine
Strong-smelling urine
Blood in the urine
Pain or pressure in the lower abdomen or pelvis
Pain in the back or side
Fever or chills
Nausea or vomiting
Feeling tired or unwell
Confusion, especially in older adults
Symptoms that start suddenly and worsen quickly