Aversion therapy is a type of behavior therapy designed to make a patient give up an undesirable habit by causing them to associate it with an unpleasant effect. With this, the patient is exposed to a stimulus while simultaneously being subjected to some form of discomfort. For example, a person undergoing aversion therapy to stop smoking might receive an electrical shock every time they view an image of a cigarette or the taste of the cigarette is very unpleasant or sickening. The goal of the conditioning process is to make the individual associate the stimulus with unpleasant or uncomfortable sensations. However, aversion therapy doesn't work for everyone; patients may appear to be treated by therapy, but once out of the view of doctors, where the drugs that keep them from going back to their habits or electric shocks are removed, they may feel able to return to their addictions or undesirable behavior hence the high rates of relapse. The video above gives a summary of how aversion therapy is used to treat individuals with different habits such as drinking, smoking, nail biting and others.