Doctors consider a number of criteria when diagnosing avoidant restrictive food intake disorder, including a lack of interest in food or avoidance of food because of texture, taste, or smell, inability to gain enough weight, interference with psychosocial functioning, and dependence on dietary supplements or tube feedings.
Doctors may also perform imaging and blood testing to determine if there are any medical reasons for weight loss or GI discomfort and to screen for nutritional deficiencies. Some children need additional testing, such as endoscopy or brain imaging, but doctors usually diagnose ARFID from a health history and physical exam.

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