Avoidant/Restrictive Food Intake Disorder (ARFID) is a new diagnosis in the DSM-5, and represents a reformulation of what used to be called “Feeding Disorder of Infancy or Early Childhood.”1 Individuals with ARFID limit the volume and/or variety of foods they consume, but unlike the other eating disorders, food avoidance or restriction is not related to fears of fatness or distress about body shape, size or weight. Instead, in ARFID, selective eating is motivated by a lack of interest in eating or food, sensory sensitivity (e.g., strong reactions to taste, texture, smell of foods), and/or a fear of aversive consequences (e.g., of choking or vomiting).2

While there is limited research on the prevalence of ARFID, studies have found that between 0.5%-5% of children and adults in the general population have the disorder.3 Though ARFID most commonly develops during infancy or early childhood, it can persist into adulthood or develop at any age.3,4

Although many children go through phases of picky or selective eating, a person with ARFID has a diet that is so limited it leads to medical, nutritional, and/or psychosocial problems.5 This may mean weight loss, or stalled growth; significant nutritional deficiencies that will vary based on diet; and interference in relationships or engagement in school or work due to difficulties eating.5

(http://www.autoadmit.com/thread.php?thread_id=5526123&forum_id=2#47642773)