What are the signs of anorexia in a teen?
Last updated September 3, 2026.
Watch the pattern, not the scale: food rules tightening, hiding meals, compulsory exercise, constant cold, thinning hair, periods stopping, and body talk that no longer matches reality. NIMH classifies eating disorders as serious and potentially life-threatening, and teens are the highest-onset group - so act on the pattern early rather than waiting for certainty. The working approach: lead with specific observations and concern, not accusations or food policing, and involve the pediatrician fast - early treatment changes the outcome.
What to do
- Log the specific changes. Concrete observations carry the conversation with the teen and the doctor.
- Lead with concern, not control. "I have noticed you seem exhausted and cold" lands; food policing backfires.
- Call the pediatrician this week. Early treatment dramatically improves outcomes.
- Do not wait for certainty. The pattern is enough to start the evaluation. In crisis: 988 in the US, or your local crisis line.
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