This literature review examines queer studies and the marginalization of LGBT people. It discusses queer theory and how it explores gender and sexuality categorization. LGBT people face various forms of social, economic, and cultural injustice that results in their marginalization from mainstream society. This marginalization excludes them from support systems and leads to higher rates of psychological issues like depression and anxiety. While the term "queer" was previously a slur, it is now used as an umbrella term for marginalized sexual identities and as part of theoretical approaches to issues of sexual identity.