In this review, we analyze the blurred boundary – or conceptual convergence – between health‐related social support and social control in close relationships. We begin with a brief overview of research on social support, defined as the provision of assistance or influence to help a close other achieve a health‐related goal or cope with illness related stressors, and social control, refers to communication intended to evoke health behavior change from a relational partner. We then disentangle the conceptualization and measurement of communication as social support and as social control over the last two decades. In articulating the conceptual convergence between social support and social control, we illustrate several patterns regarding what is being researched, how research has been conducted, and who is involved in existing research, thereby shedding light on the dynamics of power and privilege in conceptual and operational assumptions regarding these constructs in the literature. In addition, we propose ways for future scholarship to reflect more diverse methods, topics, and populations.