Introduction: Practising medicine exposes physicians to emotionally difficult situations, which can be devastating, and for which they might be unprepared. Informal peer support has been recognised as helpful, although this phenomenon is understudied. Hence, it is important to develop a better understanding of the features of helpful informal peer support from the experiences of physicians who have successfully moved through such difficult events. This could lead to new and potentially more effective ways to support struggling physicians. Methods: Rural Canadian generalist physicians were interviewed. Using a hermeneutic phenomenological approach, data analysis was oriented towards understanding features of helpful informal peer support and the meanings that participants derived from the experience. Results: Eleven rural generalist physicians took part. Peer support prompted the processing of difficult emotional experiences, which initially seemed insurmountable and career-ending. Participants overcame feelings of emotional distress after even brief encounters of informal peer support. Most participants described the support they received as vitally important. After the peer support encounter, practitioners no longer thought of leaving medical practice and felt more able to handle such difficulties moving forward. Conclusions: Informal peer support enabled recipients to move through an emotionally difficult experience. Empathy, shared vulnerability and connection were the part of the peer support encounter. In addition, the support offered benefits which are known to help physicians not only process emotionally difficult events but also to acquire 'post-traumatic growth'. Practitioners, healthcare leaders and medical educators all have roles to play in enabling the conditions for informal peer support to flourish. [ABSTRACT FROM AUTHOR]