Background: Social media platforms have become ubiquitous, connecting billions globally and reshaping communication, self-expression, and social support. However, concerns are growing about their adverse effects on mental health, particularly among young adults.

Aim: This study investigates the impact of social media usage on depression, anxiety, stress, and well-being among physiotherapy students.

Methodology: A cross-sectional survey was conducted among physiotherapy students aged 17–24. The Social Media Disorder Scale (SMD) and Depression, Anxiety, and Stress Scale (DASS-42) were administered online to assess social media addiction and emotional distress. Descriptive statistics and Spearman’s correlation were used to analyze the relationship between social media use and mental health outcomes.

Results: The study found statistically significant positive correlations between social media addiction and levels of depression, anxiety, and stress (p < 0.001). Students with higher SMD scores were more likely to experience elevated emotional distress.