Avoidant/restrictive food intake disorder (ARFID) is a relatively newly introduced diagnostic category within the feeding and eating disorders. This article summarizes current knowledge and clinical practice relating to ARFID in youth. It discusses epidemiology, diagnosis, clinical assessment, treatment interventions, prognosis, and outcome. Gaps in the existing research literature are highlighted, promising avenues of current research signposted, and potentially useful future directions proposed. The article is relevant to clinicians wishing to ensure their practice is based on up-to-date information, as well as researchers interested in furthering knowledge relating to ARFID.