In simple words: Anorexia is an eating disorder where people become dangerously underweight because they're terrified of gaining weight. They see themselves as overweight even when they're very thin.This can involve limiting food, exercising too much, or making themselves throw up.

Anorexia nervosa is an eating disorder characterized by a relentless pursuit of thinness and an intense fear of gaining weight, leading to significantly low body weight in the context of age, sex, developmental trajectory, and physical health.The individual experiences a distorted body image, overvaluing body weight or shape in self-evaluation, or denying the seriousness of their low body weight.This may involve restricting food intake, excessive exercise, and/or purging behaviors.

Example 1: A 16-year-old female presents with significant weight loss, amenorrhea, and bradycardia. She expresses intense fear of gaining weight and denies her emaciated appearance.She restricts food intake and exercises excessively.Diagnosis: F50.0 Anorexia Nervosa., A 22-year-old male presents with low body weight, fatigue, and electrolyte imbalance.He engages in binge-eating episodes followed by self-induced vomiting. Despite being underweight, he perceives himself as overweight and continues to restrict his overall caloric intake. Diagnosis: F50.0 Anorexia Nervosa., A 45-year-old female, despite being significantly underweight, reports feeling overweight. She strictly limits her food intake, avoids social situations involving food, and displays obsessive behaviors around exercise and calorie counting.She experiences amenorrhea and denies the seriousness of her condition.Diagnosis: F50.0 Anorexia Nervosa.

Documentation should include:Body weight and height; BMI; evidence of significantly low body weight; detailed history of eating habits, exercise patterns, and weight loss; patient's perception of body weight and shape; presence of fear of weight gain; presence of body image disturbance; impact on physical health (e.g., amenorrhea, bradycardia, electrolyte imbalances); mental health assessment (e.g., anxiety, depression, obsessive-compulsive traits); any purging behaviors; family history of eating disorders; and treatment plan.

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