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What is anorexia nervosa?
2026-04-11 20:19:30
Anorexia Nervosa Overview
Anorexia Nervosa is aExtreme dietary restrictions and morbid fear of gaining weightandDistorted body image perceptionIt is a mental illness with core characteristics, mostly affecting teenage girls. Its main performance isDeliberate dieting results in weight significantly lower than normal, accompanied by physiological damage such as endocrine disorders and osteoporosis, which can be life-threatening in severe cases. In terms of content structure, this article will analyze itsDefinition and symptoms,Causes and risk factors,Diagnosis and TreatmentandThe importance of social support, to help readers fully understand this disease.
Symptoms and clinical manifestations

Typical symptoms of anorexia nervosa includeRefusal to maintain normal weight(BMI≤17.5),excessive exerciseandExtremely sensitive to food calories. Patients are often accompanied bybody image disorder(Even if you are thin, you still think you are fat), and may control your weight by inducing vomiting, abusing laxatives, etc. It will appear physiologicallyMenopause(female),dry skin,irregular heartbeatand other complications. At the psychological level, it is expressed asanxiety,depressionandsocial avoidance, severe cases may lead to suicidal tendencies.
Causes and risk factors
The cause of the disease is complex and involvesgenetics(Family history increases risk 6-10 times),sociocultural pressure(such as the aesthetic concept of "thinness is beauty") andpsychological traits(Perfectionism, low self-esteem). Research shows thatHormonal changes during pubertywithneurotransmitter abnormalities(such as serotonin imbalance) may also trigger disease. In addition,traumatic experience(such as school bullying) orCareer needs(Athletes, models) further increase the risk.
Treatment and recovery support
Treatment needsMultidisciplinary collaboration, includingmedical intervention(nutritional reconstruction, drug treatment),psychotherapy(mainly cognitive behavioral therapy) andfamily support. Early intervention can significantly improve the recovery rate, but about 20% of patients will develop a chronic disease course. Need to pay attention to the recovery stagePrevent recurrence, such as establishing healthy eating habits and improving social environment. Some medical institutions such asDepartment of Psychology, Peking Union Medical College Hospital,Shanghai Mental Health CenterProvide specialized diagnosis and treatment services.
Summary and social significance
Anorexia nervosa is not only a personal health problem;social beauty standardswithmental health educationmissing. The public needs to abandon the prejudice that "thin is beautiful", and schools and families should strengthenYouth psychological counseling. If you find suspected symptoms, you should seek medical treatment promptly to avoid delaying treatment. Help patients return to a healthy life through scientific understanding and inclusive support.
| Related data | Reference value |
|---|---|
| Female prevalence | 0.3%-1% (global statistics) |
| Mortality | 5%-10% (without treatment) |
| High incidence age | 15-25 years old |
Citing sources
1. Diagnostic and Statistical Manual of Mental Disorders (DSM-5) of the American Psychiatric Association
2. World Health Organization (WHO) "International Classification of Diseases, 11th Revision (ICD-11)"
3. Expert opinion: Dr. Walter Kaye (Director, Center for Eating Disorders Research, University of California, San Diego)
4. Domestic diagnostic and treatment institutions: Peking Union Medical College Hospital, Shanghai Mental Health Center (no specific products involved)
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