Discrimination against Filipino LGBTQ people in the Philippines has various causes: culture, religion, power, or ideological differences. History plays a significant role in its development and reinforcement with the introduction of colonial beliefs into the Philippines. History has shown that they were once respected in society and had the freedom to practice their sexuality. The problem persists despite a few recent national and international milestones concerning the LGBTQ+ community. The transition of their societal status from celebrated to discriminated against raises the question: what happened? This study analyses how the problem existed and progressed by diagnosing the problem. Guided by Michel Foucault’s Genealogy, this study identifies the origins of sex and gender discrimination in Filipino culture by reviewing research on Filipino LGBTQ people and history from the pre-colonial era to the 20th century. The discussion extends to the effects of society’s prejudice, the devaluation of their once great stature, and the lack of research on Filipina lesbian people. The study discovered that homophobia in the Philippines is culturally engraved, vulnerable to western influences, and obliviously practiced. Moreover, the existence of the appropriation of the heterosexual mainstream was observed and seemed celebrated in Philippine society.