Borderline Personality Disorder (BPD) is a condition characterised by significant social and occupational impairment and high rates of suicide. In high income countries, mental health professionals carry negative attitudes towards patients with BPD, find it difficult to work with patients with BPD, and even avoid seeing these patients. Negative attitudes and stigma can cause patients to fear mistreatment by health care providers and create additional barriers to care. Patients’ self-stigma and illness understanding BPD also affects treatment engagement and outcomes; better knowledge about mental illness predicts intentions to seek care. The perspectives of mental health clinicians and patients on BPD have not been researched in the Pakistani setting and likely differ from other settings due to economic, cultural, and health care system differences. Our study aims to understand the attitudes of mental health clinicians towards patients with BPD in Pakistan using a self-report survey. We also aim to explore explanatory models of illness in individuals with BPD and their family members/carers using a Short Explanatory Model Interview (SEMI). The results of this study are important as we know attitudes and illness understanding greatly impact care. Results of this study will help guide BPD-specific training for mental health clinicians who care for patients with BPD and help inform approaches to interventions for patients with BPD in Pakistan.