What is a bladder infection (cystitis)?
A bladder infection, also called cystitis, is caused by an abnormal growth of bacteria inside the bladder, the balloon-like organ that stores urine. Bladder infections are one of the most common bacterial infections to affect humans, with up to one-third of all females having at least one infection at some point in their lives.
Bladder infections are classified as either simple or complicated. Simple bladder infections affect healthy men and non-pregnant women with normal urinary systems. Bladder infections occur much more commonly in women compared to men.
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