what causes cystitis
Cystitis Symptoms, Causes & Treatment. Cystitis is a type of bladder inflammation, usually caused by a urinary tract infection (UTI), and is particularly common in women. Although it can cause pain and discomfort, most cases tend to clear up of their own accord.
Bacterial cystitis. UTIs typically occur when bacteria outside the body enter the urinary tract through the urethra and begin to multiply. Most cases of cystitis are caused by a type of Escherichia coli (E. coli) bacteria. Bacterial bladder infections may occur in women as a result of sexual intercourse.