Aim: This study aimed to examine the effects of health-related content on social media on nursing students’ health behaviors, approaches to information, and professional attitudes, as well as its reflections on individual health practices, perceptions of information security, and professional identity development. Methods: The study was conducted using a qualitative phenomenological design. Semi-structured in-depth interviews were carried out with 20 nursing students enrolled at a foundation university in Istanbul. Data were analyzed using thematic analysis. Results: Three main themes emerged from the analysis: (1) Access to and Approach toward Health Information, (2) Impact on Health Behaviors, and (3) Professional Identity and Role Perception. Participants reported that social media facilitated access to health information and encouraged healthy lifestyle behaviors. However, information overload, conflicting content, and concerns regarding the reliability of information complicated decision-making processes. In addition, idealized portrayals of nursing on social media influenced students’ perceptions of professional identity. Conclusion: Social media plays a significant role in shaping nursing students’ health behaviors and professional identity development. Strengthening digital health literacy and critical media literacy skills within nursing education may help students evaluate online health information more effectively and develop a more realistic understanding of their professional roles.