Bilateral parotid enlargement are presenting features of some metabolic and systemic disease but also of chronic emesis.
A 24-year old woman consulted during three years many physicians asking for the treatment of a painless parotid swelling confusing with a Sjogren's syndrome. After an initial denial, the weight history, alteration of tooth wear and hypokaliemia conducted to admit a self inducing vomiting with bulimia nervosa.
Gender, young age, weight history, tooth alteration and electrolytic disorders are the main diagnostic tool of this dissimulated etiology of parotid swelling.