Infection of the bladder (cystitis)
Infection of the bladder (cystitis)

The most common UTIs occur mainly in women and affect both the bladder and urethra. Infection of the bladder (called cystitis) is a type of common UTI which is usually caused by Escherichia coli (E. coli). E coli is commonly found in the gastrointestinal (GI) tract.