<p>Existing perspectives suggest that adolescents’ experiences of autonomy and perceived relational distance within family contexts are closely intertwined with their information management toward parents. This daily diary study examined bidirectional, within-person associations between adolescents’ disclosure and concealment, functional autonomy, and detachment from mothers. A total of 208 adolescents (<i>M</i>_age = 15.00, 56.70% female) completed 21 daily assessments. Dynamic Structural Equation Models showed that youth disclosed more than usual following days when they reported higher functional autonomy. Conversely, they concealed more than normal following days when they experienced greater detachment from mothers. These unidirectional effects suggest that, at the daily level, disclosure might function as a proximal expression of adaptive self-directed functioning, whereas concealment might act as a warning sign of problematic detachment from mothers. This study highlights everyday information management behaviors as meaningful indicators of adolescents’ fluctuating experiences of functional autonomy and perceived distance from parents.</p>