Burning mouth syndrome (BMS) can negatively impact health-related quality of life (HRQoL) and is linked to anxiety and depressive disorders. Less is known about pain-related cognitions in BMS and how they affect mood and health. To describe pain catastrophising, pain self-efficacy and chronic pain acceptance in BMS patients and explore associations with affective function and HRQoL. A cross-sectional study of 36 BMS patients (31 female) referred to an Orofacial Pain Clinic completed the Pain Catastrophizing Scale, the Pain Self-Efficacy Questionnaire and the Chronic Pain Acceptance Questionnaire-8 in addition to standardised self-reported questionnaires measuring mood and oral and generic HRQoL