Riga-Fede disease is a benign and uncommon mucosal disorder. This illness is an ulceration of the oral mucosa and arises from repetitive traumatic injuries. The disease is usually caused by the sharp edges of new erupted teeth. The aim of the present case report is to present Riga-Fede disease and its treatment. We reported a 11-month-old healthy female infant diagnosed as Riga-Fede disease based on clinical features. After the conservative treatment that focused on eliminating the source of trauma, total healing was observed. Riga-Fede disease is rare. This illness can be confused with malignancies. Therefore, the diagnosis and treatment of this disease are very important for physicians and patients.