Addictions are treatable diseases that affect your brain and your behavior. People can become addicted to many different things including: drugs, alcohol, smoking, food, exercise, gambling, sex, pornography, shopping, and/or work. Someone who is addicted to these things often acts without thinking of the consequences, such as problems with health, money, relationships, and performance at work or at school. Addictions can often be effectively treated with cognitive-behavioral therapy by learning to replace inappropriate ways of thinking and behaving with ways that function better.