Eating disorders are complex conditions affecting millions of individuals worldwide, with significant physical, psychological and social consequences. These disorders can develop at any age and across all demographics, impacting multiple organ systems, including the oral cavity. Genetics, brain chemistry, environment and social influences contribute to their onset, often running in families. External triggers, including dieting trends, media representation and fashion standards, can further exacerbate an individual’s predisposition to disordered eating behaviours. The most common eating disorders include anorexia and bulimia nervosa. They are characterised by severe food restriction and distorted body image, often leading to excessive exercise or purging behaviours. Bulimia nervosa also involves recurrent binge eating episodes followed by compensatory behaviours such as vomiting or laxative use. These disorders have widespread systemic effects, including notable oral manifestations that may serve as early indicators for diagnosis. Chronic malnutrition, acid erosion from vomiting, xerostomia and increased susceptibility to dental caries are frequently observed. Despite extensive research linking eating disorders to specific oral conditions, early recognition remains challenging and often depends on the clinician’s experience. This chapter highlights the key oral manifestations of eating disorders, providing essential guidance for general dentists in early detection and multidisciplinary management, ultimately contributing to improved patient outcomes.