Addiction is defined as a chronic, relapsing disorder characterized by compulsive drug seeking, continued use despite harmful consequences, and long-lasting changes in the brain. It can affect families, relationships and careers, as well as the mental health of the person suffering from the addiction. Some people may downplay their addictions as fairly harmless, but more often than not, they are damaging to the person suffering from the addiction and the people around them. The study of epigenetics, in relation to addiction, is an important step in curbing and treating them in the long run.