Types

Understanding Anorexia Nervosa

Choose a preferred language

Anorexia nervosa is an eating disorder that can happen to anyone, but it mostly affects young women. It can threaten your health, your well-being, and even your life. Much about anorexia isn’t fully understood. But it can be treated. Talk to your doctor or a mental health professional. They can help.


What is anorexia?

If you have anorexia, you likely have a false image of your body. No matter how thin you are, you may see yourself as fat. And you may try almost anything to lose weight. You might eat very small amounts of food. You might even weigh each bite. Or you might not eat at all. To burn more calories, you might exercise too much and too often. But without enough fuel, your body starts to starve. Over time, you may lose 15 % or more of your total weight. As a result, you may feel cold all the time. Your menstrual periods may stop. And your muscles may start to waste away. Sadly, some women with anorexia die—often of heart disease.


Symptoms of anorexia

  • A low body weight defined as a BMI (body mass index) of less than 18.5

  • Extremely restricted eating

  • Extreme thinness (emaciation)

  • Weight loss of 15% or more of body weight

  • Relentless pursuit of thinness

  • Fear of gaining weight, if you’re very thin

  • Lack of menstrual periods (in women)

  • Problems with digestion, energy, memory, and concentration

  • Growth of fine hair all over the body (lanugo)

  • Thinning of the bones (osteopenia or osteoporosis)

  • Mild anemia and muscle wasting and weakness

  • Feeling cold all the time

  • Loss of sex drive

  • Dental cavities

  • Hair loss

  • Dry skin

  • Severe constipation


Who does it affect?

Anorexia can affect anyone, including men. But it's most common in women. It's more common in people who do activities that value thinness, such as modeling, ballet, gymnastics, and other sports. The causes are not known. But they probably include traits you are born with, lessons you learn growing up, and the values of society. People with anorexia are often concerned with being perfect. Many feel pressured to succeed by parents, coaches, teachers, or on their own. Some have a hard time coping with stress. People with anorexia are also more likely to have depression.


Getting treatment

It can be hard to admit you have an eating disorder. In fact, you may not even notice how thin you are. You may keep trying to lose weight. You may also try to hide your problem from others. But in most cases, anorexia won’t go away on its own. Fortunately, treatment often can help. The first step is to confide in someone you trust. You don’t have to deal with anorexia alone.

Online Medical Reviewer: Marianne Fraser MSN RN

Online Medical Reviewer: Paul Ballas MD

Online Medical Reviewer: Raymond Kent Turley BSN MSN RN

Date Last Reviewed: 05/01/2025

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
doctor icon

Find the right provider to meet your needs

From primary care to specialty services and more.

Find a Doctor
appointment clock icon

Call for an Appointment

Offering personalized care at more than 20 clinics across three cities and two states.

Call Now
Related Articles
Read article
Mental Health
Understanding Agoraphobia

If you have an intense fear of being out in public places alone or otherwise, you may have an anxiety disorder called agoraphobia. Here is information about the disorder and available treatment options.

Read article
Mental Health
Understanding Borderline Personality Disorder (BPD)

Borderline personality disorder (BPD) is a serious medical illness. It can make close relationships hard to maintain, and it may cause the affected person and their loved ones great pain. But BPD can be treated, and the symptoms can be eased. If a loved one has signs of BPD, start by talking to your doctor or a mental health professional. They can offer guidance and support.

Read article
Mental Health
Understanding Social Phobia (Social Anxiety Disorder)

Social phobia (also called social anxiety disorder) is an intense fear of being humiliated in a social or work setting. To avoid the anxiety, you may stay away from group settings.

Read article
Mental Health
Understanding Bulimia Nervosa

Bulimia nervosa is a disorder in which food intake gets out of control. Having this eating disorder is nothing to be ashamed of. Talk to your healthcare provider or another person you trust. You may find it's a relief just to tell someone.