Evidence indicates recent increases in breast cancer diagnoses among young women. Research also suggests that younger women diagnosed with breast cancer may experience more psychological distress than older women. In-depth interviews with 25 breast cancer survivors age 40 and under were conducted to explore the uncertainties young women face throughout survivorship. Results indicate that young women experience unique sources of uncertainty and that communication may facilitate or hinder the management of uncertainty across the survivorship trajectory. Implications of these findings for theorizing on uncertainty, healthcare providers’ interactions with young women, and social networks’ communication with survivors are discussed. These data also have important implications for the practical treatment of young breast cancer survivors and applied, communicative recommendations for providers are proposed.