Research has shown that patient participation in online forums is potentially beneficial in terms of psychological support processes,especially by fostering the development of a positive group identity and selfvalidation.This is particularly relevant to patients with chronic pain conditions,such as Complex Regional Pain Syndrome (CRPS),who often experience a loss of identity associated with the negative changes to their daily activities and social life.The aim of this study is to explore the role of first posts in the development of a supportive online community.Thematic analysis identified five themes,all of which support the development of a common-identity community.The findings are discussed in relation to the development of support and implications for health professionals are outlined.