This study aims to identify and analyze the various factors associated with mental stress and to examine how these factors influence the academic achievement of high school students. Mental stress has become a critical concern in contemporary education, as adolescents are exposed to increasing pressures both inside and outside the classroom. Academic demands, social expectations, peer pressure, financial instability, and uncertainty about future careers are only some of the elements that contribute to stress during this formative stage of life. When left unaddressed, such stressors not only hinder learning and concentration but also impact students’ overall mental health, behavior, and physical well-being.