Urinary tract infections (UTIs) typically last from a few days up to about a week, depending on whether they are treated and the severity of the infection.

• With antibiotic treatment, symptoms usually improve within 1 to 3 days, and the infection often resolves completely within a week or two

• Without antibiotics, mild UTIs may clear on their own within a few days to about a week, as the immune system fights the infection. However, symptoms can sometimes persist for a week or longer if untreated

• Untreated UTIs can last for weeks and may worsen, potentially spreading to the kidneys and causing more serious complications that require longer recovery times

• Kidney infections (upper UTIs) generally take longer to heal, often 3 to 7 days with treatment, and can require hospitalization if severe

In summary, uncomplicated UTIs usually resolve within a week with antibiotics, while untreated infections may last longer and risk complications. Prompt treatment is recommended to shorten duration and prevent progression.