A majority of bladder infections are caused by fecal contamination, since bacteria are usually found in the intestines and the skin around rectal and vaginal areas. After bowel movements, if one wipes from back to front, the bacteria from the rectal area have a good chance to reach the urethra. Therefore, lack of proper hygiene can be the single most important cause of bladder infections.

In such cases, the bacteria solely responsible for the infection is E. Coli (Escherichia coli). These bacteria pass on through the narrow urine canal that connects the outside rectal area to the bladder and cause the infection. Bladder infections are much more common in females than males.

There are many other ways for the bacteria to get into the urethra as well. For example, sexual intercourse causes the bacteria in the vaginal area to be pushed into the urethra, which then causes irritation in the bladder. Frequent rubbing of the vaginal area and wearing tight clothes can also lead to bladder infections.

Holding your urine for long periods can also result in the bladder getting infected. Frequent bubble baths can also cause irritation of the vaginal area in females. The vaginal area should be kept clean and dry, and prolonged use of nylon underwear, wet swimsuits or even tight jeans can cause infection

Sexual positions that irritate your urethra or bladder can lead to infections. A few lubricants can also cause infection. Also, lack of proper hygiene among males and females during intercourse can cause the bacteria to enter the vagina.