When bacteria get into the bladder, it can get infected. A bladder infection happens when bacteria from the skin get into the bladder. Bacteria can be spread by the way you wipe after going to the bathroom. Bacteria can also spread when you have sex. An infection may also happen if something, like an enlarged prostate in men, is blocking the flow of urine.
Women get bladder infections more often than men.
You feel the need to urinate a lot. You may feel a burning or stinging when you urinate. You may have cramps in your lower belly or back. Your urine is cloudy and smells bad. There may be blood in your urine.