AimsTo explore the influence of endometriosis on an individual's self‐concept and the potential applicability of self‐compassion in addressing alterations to self‐concept.DesignQualitative deductive template analysis study.MethodsWritten reflections completed by women (n = 157) with a self‐reported diagnosis of endometriosis were reviewed using a deductive template approach to gain an understanding of how people living with endometriosis view themselves in the face of the diagnosis.ResultsUtilising Neff's (2003) definition of self‐compassion, a series of themes emerged, with a higher number of reflections noted for each of the negative components of self‐compassion (self‐judgement, isolation, overidentification). Themes associated with negative changes to self‐concept centred around reflections of inadequacy, self‐blame, loneliness, withdrawal and avoidance, feeling misunderstood and judged by others, feeling like a burden and emotional suppression and numbing.ConclusionsEndometriosis influences three core domains of self‐concept for the person (personal, social and physical). These findings indicate that the components of self‐compassion therapy may be of relevance for healthcare providers in addressing the alterations to self‐concept experience by individuals living with endometriosis.Implications for Patient CareThis study supports the need for access to timely diagnosis and interdisciplinary care to buffer against the negative consequences for self‐concept. Nurses and allied healthcare professionals can use these findings to provide compassion‐focused care, with an emphasis on self‐kindness, common humanity and mindfulness for individuals with endometriosis.ImpactThis lived experience research highlights the influence of endometriosis on the personal, social and physical components of self‐concept, indicating a critical need to address self‐concept as part of endometriosis‐related treatment. Alterations to self‐concept may emphasise negative perpetuating cognitions and reinforce isolation, suppression of personal needs and self‐silencing.Patient or Public ContributionNo patient or public contribution.