Anorexia nervosa is an eating disorder involving weight loss, food restriction, and sometimes compulsive exercise. A combination of factors may the cause of this condition.
Whether you’re still figuring out if you have an eating disorder or you’re far along on your path to recovery, learning about the roots of anorexia could be a step toward healing.
Past experiences, environment, and personality may be involved in the development of anorexia nervosa, and the urge to lose weight and eat as little as possible.
Body image distress and fear of weight gain often cause these anorexic behaviors, but the condition goes deeper than that.
Biological and environmental factors can:
- make you more likely to develop anorexia
- activate behaviors related to anorexia
- get in the way of healing and recovery
In addition, the following factors can be linked to the cause of anorexia:
- brain chemistry
- family behaviors
- other mental health conditions
- past trauma
- social attitudes about weight
Learning about the risk factors and causes of anorexia can help people at many stages of recovery gain a better understanding of their anorexia symptoms. It can often be a validating process.
Environmental and social factors play a large role in who develops anorexia.
Eating disorders are often connected to having a history of trauma, especially childhood sexual trauma.
- physical abuse
- emotional abuse
- teasing and bullying
- parental divorce
- loss of a family member
Some other environmental risk factors of anorexia are:
- bullying, especially about weight
- childhood adversity or trauma
- isolation and loneliness
- being in environments with high pressure to have a smaller body (like modeling and ballet)
- history of family or generational trauma
- living in a culture that promotes small bodies as ideal
The most common traumatic events were connected to sexual trauma.
Sometimes anorexia can be activated when a person who has other anorexia risk factors spends a lot of time in situations where the pressure to have a small body is very strong.
Certain personality traits are more common in people with anorexia.
Anorexia has been linked to:
- body dissatisfaction and frequent thoughts about an “ideal” appearance
- anxiety disorders such as social anxiety disorder, generalized anxiety disorder, and obsessive-compulsive disorder (OCD)
- history of dieting or other weight-control methods
- autistic features
- rigid ideas, beliefs, or plans
Some research estimates that anywhere from 8 to 37% of people with an eating disorder could be autistic.
One study found the chances of autism were more than 15 times greater in people with anorexia than in those without.
Researchers also looked at the
People with cognitive inflexibility may have a harder time adapting to unexpected conditions. They might stay more focused or get stuck on one issue longer.
The study found that eating disorder symptoms and social anxiety were both tied to cognitive inflexibility. And when researchers took social anxiety out of the picture, the link between eating disorder symptoms and cognitive inflexibility stayed strong.
Perfectionism could also play a major role in anorexia, both before and after recovery. Researchers
For decades, people believed social, cultural, and family behaviors were the main cause of anorexia. But anorexia can run in families, and twin studies suggest genetics play an important role.
Genetic risk factors of anorexia include:
- having a family member with an eating disorder
- having a family member with a mental health condition
- living with type 1 diabetes
Your chance of developing anorexia is much higher if a close family member has it. If you have a parent, sibling, or child with anorexia, your risk of developing it could be
Living with type 1 diabetes is also a key risk factor for anorexia.
The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) classifies restricting insulin as a purging behavior. If someone is restricting both food and insulin, they could meet the criteria for anorexia nervosa with purging behaviors.
Eating disorders can impact anyone of any age, gender, socioeconomic status, or race. But some people may have more risk factors that increase their chances of having anorexia.
Women are about 2 to 3 times more likely to develop anorexia than men. But rates of anorexia in men may be underreported due to stigma.
Teens and young women in their early 20s seem to have a higher risk of anorexia than other age groups.
Another factor is having a mental health issue, such as:
- a mood disorder
Many people with anorexia are also on the autism spectrum.
Social and cultural pressures to have a small body can also be risk factors for eating disorders. For example, anorexia is more common in Western culture and in people recently exposed to Western culture.
Low self-esteem is another known risk factor for anorexia.
A healthcare professional can diagnose anorexia. To get a diagnosis, you might talk to:
- a pediatrician
- a family practitioner
- a psychiatrist
This might involve a physical exam and a mental health evaluation. If you want to learn more about anorexia symptoms first, here’s one good place to start.
The DSM-5 has these guidelines for diagnosing anorexia nervosa:
- weight loss that impacts your health and well-being
- strong fear of gaining weight
- body image distortion
- view of body weight and shape that affects your self-esteem
- lack of recognition that the weight loss is taking a toll on your health
Anorexia can impact people of any body size.
People with atypical anorexia might be considered average or overweight according to the BMI. But the weight loss they’ve experienced can cause the same health impacts as it would in someone with a smaller body who has anorexia.
So what causes anorexia? It’s caused by a complex interaction of your environment and genetics. Social situations and personality could play especially big roles in whether someone has anorexia.
If you think you have anorexia, you’re not alone. Treatment centers, counseling, family therapy, and other methods can help you build a good relationship with food and your body.