Anorexia Nervosa

What is anorexia nervosa?

Anorexia nervosa is a serious mental health condition and eating disorder. People with anorexia nervosa severely limit how much they eat, have an intense fear of gaining weight, and often see their body as larger than it really is. Even when they become underweight, they may still believe they need to lose more. The word anorexia literally means loss of appetite, but this is misleading: most people with the condition are hungry and work hard to ignore that hunger.

Anorexia nervosa is not a lifestyle choice or a phase. It is a recognized medical illness that affects the mind and the body at the same time. Because the body is starved of the energy and nutrients it needs, the condition can damage the heart, bones, hormones, digestive system, and brain. Among mental health conditions, it is considered one of the most medically dangerous.

The condition most often begins during the teenage years or early adulthood, and it has historically been diagnosed more often in girls and women. However, boys, men, older adults, and people of every body size, culture, and background can develop it. In many cases it goes unrecognized for a long time because weight loss is praised or because the person hides their behavior. In many hospitals, including Acibadem, anorexia nervosa is managed by the psychiatry and psychology department, often working together with nutrition specialists and general physicians.

Anorexia nervosa symptoms

Anorexia nervosa symptoms fall into three broad groups: changes in behavior around food and weight, changes in thinking and mood, and physical signs caused by malnutrition (a lack of enough energy and nutrients). Not everyone shows every symptom, and the early signs can be subtle.

Behavioral symptoms may include:

• Eating very little, skipping meals, or cutting out whole food groups
• Counting calories, weighing food, or following rigid food rules
• Exercising excessively or compulsively, even when tired or unwell
• Avoiding meals with other people or making excuses not to eat
• Wearing loose clothing to hide weight loss
• Frequent weighing or checking the body in mirrors
• Cooking for others without eating, or cutting food into tiny pieces

Emotional and thinking symptoms may include:

• Intense fear of gaining weight, even when underweight
• Distorted body image, meaning the person sees themselves as larger than they are
• Self-worth that depends heavily on weight and shape
• Denial that there is a problem, or that low weight is dangerous
• Irritability, anxiety, low mood, or withdrawing from friends and family

Physical symptoms may include:

• Significant weight loss or, in children and teenagers, failure to grow and gain weight as expected
• Constant tiredness, dizziness, or fainting
• Feeling cold all the time, and cold hands and feet
• Missed menstrual periods in girls and women
• Dry skin, brittle nails, thinning hair, and fine downy hair on the body (called lanugo)
• Constipation, bloating, and stomach pain
• Slow heart rate and low blood pressure
• Trouble concentrating and sleeping

Doctors describe two main types. In the restricting type, weight loss comes mainly from eating very little and exercising. In the binge-eating/purging type, the person also has episodes of eating large amounts or of purging, which means trying to get rid of food through vomiting, laxatives (medicines that cause bowel movements), diuretics (medicines that increase urination), or enemas. Purging adds risks such as damaged teeth, a sore throat, swollen cheeks, and dangerous changes in blood salts.

Symptoms also change with stage. Early on, a person may simply seem to be dieting or eating more healthily. As the condition progresses, physical signs become more obvious and thinking becomes more rigid. In severe or long-standing anorexia nervosa, organ damage, bone loss, and life-threatening heart rhythm problems can develop.

Causes and risk factors

The exact anorexia nervosa causes are not fully understood. Research suggests it develops from a combination of biological, psychological, and social factors rather than from any single cause. It is not caused by parents, and it is not simply the result of wanting to look like people in the media.

Biological factors: Anorexia nervosa tends to run in families, which points to a genetic contribution. Differences in brain chemicals that regulate appetite, mood, and reward may also play a role. Once starvation begins, it changes how the brain works, which can lock in the rigid thinking that keeps the illness going.

Psychological factors: Certain personality traits are more common in people who develop the condition, including perfectionism, a strong need for control, high anxiety, and difficulty tolerating uncertainty. Other mental health conditions, such as anxiety disorders, depression, and obsessive-compulsive disorder (a condition involving unwanted repeated thoughts and behaviors), often occur alongside it.

Social and environmental factors: Cultural pressure that values thinness, teasing or bullying about weight, and activities that emphasize body shape, such as certain sports, dance, or modeling, can raise the risk. Stressful life events, including bereavement, family conflict, moving schools, or abuse, sometimes come before the illness begins. Dieting itself is a frequent starting point, particularly in someone who is already vulnerable.

Recognized risk factors include:

• Being a teenager or young adult
• A family history of eating disorders, anxiety, or depression
• A personal history of anxiety, depression, or obsessive traits
• Perfectionism and a strong drive for achievement
• A history of dieting or weight-related teasing
• Participation in weight-focused sports or professions
• Major life changes or trauma

Anorexia nervosa diagnosis

There is no single blood test or scan that confirms anorexia nervosa. Diagnosis is based mainly on a detailed clinical assessment. A doctor, psychiatrist (a medical doctor who specializes in mental health), or psychologist will ask about eating habits, weight history, exercise, thoughts about body shape, mood, and any purging behaviors. Because people with the condition may minimize or hide their symptoms, information from family members is often helpful, especially for children and teenagers.

Clinicians usually rely on standard criteria, such as those in the DSM-5 (the Diagnostic and Statistical Manual of Mental Disorders) or the ICD (the World Health Organization’s International Classification of Diseases). In broad terms, these criteria look for:

• Restriction of food intake leading to a significantly low body weight for age, sex, and health, or failure to gain expected weight in young people
• An intense fear of gaining weight, or persistent behavior that prevents weight gain
• A disturbed view of one’s body weight or shape, or failure to recognize the seriousness of the low weight

Doctors are careful not to rely on weight alone. A person can have serious anorexia nervosa at a weight that does not look dramatically low, particularly if the weight loss has been rapid. Clinicians also consider atypical anorexia nervosa, in which all the psychological features are present but weight remains within or above the normal range.

Alongside the mental health assessment, a medical examination is essential to check how the body has been affected and to rule out other causes of weight loss such as thyroid disease, digestive disorders, diabetes, or cancer. This typically includes:

• Measuring height, weight, and body mass index (BMI), and for young people plotting these on growth charts
• Checking heart rate, blood pressure (including when standing up), and body temperature
• Blood tests to check blood salts such as potassium and sodium, kidney and liver function, blood sugar, blood counts, and thyroid hormones
• An electrocardiogram (ECG), a recording of the heart’s electrical activity, to look for slow or irregular heart rhythms
• A bone density scan (DEXA) if the illness has lasted some time, to check for bone thinning
• Screening questionnaires and assessments for depression, anxiety, and suicidal thoughts

These tests do not diagnose anorexia nervosa on their own, but they help the team judge how urgent the situation is and whether hospital care is needed.

Anorexia nervosa treatment options

Anorexia nervosa treatment options address both the physical effects of starvation and the thoughts and behaviors that drive the illness. Treatment is usually delivered by a team that may include a psychiatrist, psychologist, dietitian (a nutrition specialist), family doctor or pediatrician, and nurses. Recovery generally takes time, often many months to years, and early treatment is linked with better outcomes.

Restoring nutrition and weight: Getting the body enough energy is the first priority, because psychological therapy is much less effective in a starved brain. A dietitian helps plan regular, gradually increasing meals. In severe cases, refeeding is done under close medical supervision because restarting nutrition too quickly can cause dangerous shifts in blood salts and fluid, a problem known as refeeding syndrome. Feeding through a thin tube passed into the stomach is sometimes needed when a person is medically unstable or unable to eat enough by mouth.

Psychological therapy: Talking therapies are the core of treatment. Common approaches include:

• Family-based treatment, often used for children and teenagers, in which parents take an active role in supporting eating and recovery at home
• Cognitive behavioral therapy (CBT) adapted for eating disorders, which helps people recognize and change the thoughts and behaviors that keep the illness going
• Specialist supportive clinical management and other structured therapies delivered by clinicians experienced in eating disorders
• Group therapy and nutritional counseling as part of a wider program

Medication: There is no medicine that treats anorexia nervosa itself, and medication is never used alone. Your doctor may prescribe antidepressants or other medicines to help with depression, anxiety, or obsessive thoughts that occur alongside the eating disorder, usually once some weight has been regained. Supplements such as vitamins, calcium, and vitamin D may be recommended.

Levels of care: Most people are treated as outpatients, attending regular appointments while living at home. If weight is very low, physical health is unstable, or outpatient care is not working, more intensive options include day programs, residential programs, or admission to a hospital medical or psychiatric unit. Hospital care focuses on medical stabilization, safe refeeding, and close monitoring of the heart and blood tests.

Surgery and procedures: Surgery is not a treatment for anorexia nervosa. Procedures are only used to manage complications, for example placing a feeding tube or treating a specific medical problem caused by malnutrition.

Rehabilitation and follow-up: After weight is restored, ongoing therapy and monitoring help prevent relapse, which is common in the first year. Treatment also addresses long-term effects such as bone thinning, dental damage from purging, and delayed growth or puberty in young people.

Living with anorexia nervosa and outlook

Recovery from anorexia nervosa is possible, and many people go on to live full lives with a healthy relationship with food. At the same time, it is honest to say that recovery is often slow and uneven, with setbacks along the way. Some people recover fully, some improve but continue to have some symptoms, and a smaller group develop a long-lasting form of the illness. Outcomes tend to be better when treatment starts early, when family and friends are involved, and when the person stays engaged with care even after weight has returned to a healthier range.

Anorexia nervosa carries real medical risks. Complications of starvation, especially heart problems, and suicide are the main reasons the condition can be fatal, which is why doctors treat it as seriously as any physical illness. Regular medical monitoring is an important part of staying safe during recovery.

Day-to-day, living with anorexia nervosa or supporting someone who has it can be exhausting. Practical steps that many people find helpful include keeping a regular pattern of meals and snacks, avoiding weight-focused conversations, limiting exposure to social media that promotes thinness, and staying connected with a therapist and medical team. For families, learning about the illness, staying calm and consistent at mealtimes, and looking after their own wellbeing are often encouraged by treatment teams. Relapse warning signs, such as skipping meals again, renewed food rules, or increased exercise, should be discussed with the care team early rather than waited out.

Frequently asked questions

What is anorexia nervosa in simple terms?

Anorexia nervosa is an eating disorder in which a person eats far less than their body needs because of an intense fear of gaining weight and a distorted view of their body. It is a mental health condition with serious physical effects, not a diet or a choice, and it needs professional treatment.

What are the first anorexia nervosa symptoms to look for?

Early signs are often behavioral rather than physical. These may include cutting out foods, skipping meals, new strict food rules, exercising more than usual, avoiding eating with others, and becoming preoccupied with weight and shape. Noticeable weight loss, tiredness, feeling cold, and missed periods often appear later. Any combination of these signs is a reason to seek an assessment.

What causes anorexia nervosa?

There is no single cause. Genetics, brain chemistry, personality traits such as perfectionism and anxiety, cultural pressure around thinness, and stressful life events all appear to contribute. Dieting is a common trigger in people who are already vulnerable, and starvation itself then changes the brain in ways that keep the illness going.

How is anorexia nervosa diagnosed?

Diagnosis is made through a clinical assessment by a doctor or mental health professional, based on eating behaviors, fear of weight gain, and body image, using standard criteria. A physical examination, blood tests, and a heart tracing are done to check for complications and rule out other causes of weight loss, but no single test confirms the condition on its own.

What are the main anorexia nervosa treatment options?

Treatment combines nutritional rehabilitation to restore weight with psychological therapy, such as family-based treatment for young people or cognitive behavioral therapy for adults. Medication may be used for related depression or anxiety but does not treat the eating disorder itself. Care may be outpatient, day program, residential, or inpatient depending on how unwell the person is.

Can someone have anorexia nervosa without being underweight?

Yes. In atypical anorexia nervosa, a person has the same thoughts, fears, and behaviors but their weight stays in or above the normal range, often because they started from a higher weight. The medical risks of rapid weight loss and restriction can be just as serious, so this form also needs assessment and treatment.

Is full recovery from anorexia nervosa possible?

Many people do recover fully, particularly when treatment begins early and continues after weight is restored. Recovery usually takes a long time and setbacks are common. Some people continue to have some symptoms, and a smaller number develop a long-term illness, which is why ongoing support and monitoring are important.

When to see a doctor

Anyone who notices signs of anorexia nervosa in themselves or someone they care about should arrange a medical assessment as soon as possible. Early evaluation matters even when the person insists they are fine or the weight loss seems modest. A family doctor or pediatrician is often the first point of contact and can refer to eating disorder specialists.

Seek emergency care right away if any of the following occur:

• Fainting, collapse, or severe dizziness when standing
• A very slow, very fast, or irregular heartbeat, or chest pain
• Confusion, extreme weakness, or difficulty staying awake
• Vomiting blood or passing black stools
• Seizures
• Inability to keep any food or fluids down
• Thoughts of suicide or self-harm
• Rapid weight loss over a short period, or refusal of all food and drink
• In children and teenagers, signs of dehydration such as very little urine or a dry mouth

These signs can indicate life-threatening complications of starvation or purging and require urgent medical attention.