Bladder infections, also called urinary tract infections (UTIs), are caused by bacteria in the urinary tract. Both males and females can get UTIs, but they are more common in females.

The gallbladder stores bile made by the liver. Bile helps you digest fats. During digestion, bile moves from your gall bladder to the small intestine through the cystic duct and common bile duct.

First, the good news: Sex does not cause bladder infections. Symptomatic bacterial invasion of the bladder is responsible for this common, painful infection.

The medical term for an infected hair follicle is folliculitis, which is often associated with shaving. According to MayoClinic.com, folliculitis develops when bacteria enters one or more hair follicles. Folliculitis first develops as a red bump around the hair follicle.