What is a bladder infection (cystitis)?

What is a bladder infection (cystitis)?

Cystitis is inflammation of the bladder that’s generally caused by a bacterial infection. Bladder infections occur when bacteria from the area between the vagina/penis and rectum (called the perineum) enter the urethra and travel into the bladder.

Bladder infections are the most common type of urinary tract infection (UTI). UTIs can occur in any part of the urinary tract — in the kidneys, ureters, bladder or urethra. They account for more than 8.1 million visits to health care providers every year. Approximately 60% of women and 12% of men will have at least one UTI during their lifetime.