Body image research across Asia has underscored the negative impacts of the thin ideal, primarily focusing on Japan, China, and South Korea. However, it's essential to acknowledge Asia's diversity and unique socio-political, cultural, and economic contexts. Higher-income East Asian countries' findings may not necessarily apply to Southeast Asian nations like Vietnam, which have distinct backgrounds. Vietnam's history of war and colonialism led to prolonged famine and food insecurity, but subsequent economic growth since 1986 has transformed food accessibility, altering people's attitudes towards food and their bodies. Emerging research indicates rising body image dissatisfaction, drive for thinness, and bulimic behaviors among Vietnamese women. Health concerns often fuel the desire for thinness amidst the global medicalization of "obesity." This study explored how the thin ideal influences Vietnamese women through weight comments, analyzed via online interviews with eleven participants aged 18-25, utilizing IPA approach. Findings revealed themes encompassing weight comments' characteristics, responses to weight comments, and weight stigma. Participants reported weight talks from various sources, including parents, distant family, medical providers, and social media, driven by health concerns, thin ideals, and a sense of responsibility and entitlement. Participants reported body dissatisfaction, unhealthy weight control behaviors, and negative well-being. It is essential to highlight that the thin ideal encompasses both the aesthetic and the standard of health. Regardless, the reinforcement of thinness underscores the pervasive influence of weight stigma across levels. These results emphasize the necessity for culturally appropriate models within a larger stigma framework to study body image and disordered eating behaviors effectively.