[Merycism : when humain being starts ruminating].

Merycism is a rare and little-known functional gastrointestinal disorder. Indeed, the diagnosis is made, on average, with a delay of 21 to 77 months. This delay can lead to dramatic consequences for the patient such as significant weight loss, ionic imbalance and social isolation. Through a clinical situation, we evoke the difficulties and the particularities of the diagnosis of merycism as well as its management, in a situation evoking a disorder of the eating habits. This pathology can be found in various specialties such as general medicine, pediatrics, gastroenterology, endocrinology, dentistry, child psychiatry, psychiatry, neonatology services or maternity.