symtoms and treatment to anorexia nervosa
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Home Disease Index Anorexia Nervosa

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Overview

Causes
Symptoms
Risk Factor

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What is anorexia nervosa?

 


Anorexia nervosa
is an eating disorder affecting mainly girls or women, although boys or men can also suffer from it. It usually starts in the teenage years.

It is difficult to estimate how common it is but surveys suggest that up to 1 per cent of schoolgirls and female university students have anorexia nervosa. This may be an underestimate.



Why do some people get anorexia?

 


The cause of anorexia nervosa is unknown, although it is likely that both inherent biological factors and factors in the patient's social environment play a part. The disease is mainly encountered in the western world and is more common among women in certain professions, such as models and ballet dancers. Puberty, deaths in the family and other life stresses are all believed to be potential triggers of anorexia.



What are the signs and symptoms of anorexia nervosa?

 


Weight loss of at least 15 per cent below the normal ideal body weight for a person of the same age and height.

Cessation of periods or delayed development in puberty.

Self-induced weight loss. Methods can include fasting, low food intake, excessive exercise, diuretic medicines (medicines that make you urinate more) laxatives, diet pills or vomiting. Sometimes people make themselves sick to lose weight. Others take excessive exercise.

Sufferers have a constant fear of gaining weight, as well as a feeling of being fat, even when their weight is much less than that of other people of the same height.

Sufferers may feel bloated, even after a small meal.

They may lose interest in socialising with friends.

Other side effects include tiredness, feeling cold, constipation and stomachache.

Some patients also develop additional disorders such as bulimia.

How is the disease characterised?
Body weight is maintained at least 15 per cent below that expected for a person's height.

It is self-induced weight loss caused by avoiding fattening foods and may involve taking excessive exercise, using laxatives or diuretics or self-induced vomiting.

There is a strong, almost overwhelming fear of putting on weight, with sufferers preoccupied with the shape or size of their bodies.

Rules are invented regarding how much food is allowed and how much exercise is needed after eating certain amounts of food.

Those suffering from anorexia pursue a very low 'ideal' weight.

The weight loss may cause hormonal disturbances and women with anorexia nervosa may stop having periods.



Risk Factors

 


The starvation experienced by persons with anorexia nervosa can cause damage to vital organs such as the heart and brain. Pulse rate and blood pressure drop, and people suffering from this illness may experience irregular heart rhythms or heart failure. Nutritional deprivation causes calcium loss from bones, which can become brittle and prone to breakage. In the worst-case scenario, people with anorexia can starve themselves to death. Anorexia nervosa is among the psychiatric conditions having the highest mortality rates, killing up to six percent of its victims.


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