Adolescence and emerging adulthood represent critical developmental stages marked by physical, psychological, and social transitions. This chapter explores the dynamics of family and romantic relationships during this life phase, emphasizing the influence of adverse childhood experiences, peer groups, social media, and sociocultural norms on teen dating violence (TDV). It examines theoretical models to contextualize adolescent relationship violence within broader developmental and societal structures. The chapter highlights the prevalence, warning signs, health consequences, and risk behaviours associated with TDV and outlines evidence-based strategies for prevention, assessment, and intervention. Special attention is given to technology-facilitated violence, cultural variations in norms and gender roles, and the importance of trust and developmentally appropriate communication in clinical settings. Nurses and health professionals are equipped with practical tools, screening methods, and educational resources to support adolescents in building healthy relationship skills and responding to abuse.