The goal of this observational study is to determine real-time contextual vulnerabilities associated with pain in young adults to inform ideal treatment targets for a just-in-time adaptive intervention (JITAI). The main question it aims to answer is: -What contextual factors and vulnerabilities will predict momentary, next-day, and weekly pain severity? 50 young adults, ages 18-25 with a diagnosis of childhood-onset primary chronic pain, will complete 1) baseline questionnaires on REDCap to collect data on sociodemographics, medical history and treatment, psychological health (i.e., current mood symptoms and previous psychiatric conditions/treatment), and pain (e.g., duration, location) and 2) a 28-day EMA via mobile app to collect survey data on dynamic factors.