Adolescents are experiencing mental health difficulties more frequently, and sharing medical information online via social media isbecoming more widespread. Peer-to-peer support has developed in self-forming online communities as a result of this. While existingstudies demonstrate the dissimilarity of informational quality in such communities, we still know very little about the communitiesand behavior within them. We performed interviews with two psychologists to discuss their professional views on such communitiesas well as their members. Furthermore, we used Etienne Wenger’s communities of practice theory to carry out a deductive analysis of10 videos using a digital ethnographic approach. Our findings show that the members have a safe space where they can give andreceive support. To strengthen the positive and mitigate the negative aspects, we present three implications and future work directions.