Anorexia nervosa, which is often referred to as anorexia, is caused by eating discomfort, low weight, food restriction, fear of weight gain and intense desire to thin. Many people with anorexia see themselves as overweight, however, in fact, they are often denied that they have a low weight problem. They often weigh themselves, eat small amounts, and only eat some foods. Some exercise excessive, forcing themselves to vomit for weight loss or using laxatives. Complications can include osteoporosis, infertility and heart damage. Women will often stop having menstruation.
The reason is currently unknown. Some genetic components seem to be in which the identical twins are more often affected by non-identical twins. Cultural factors also appear to play a role with the society which values the high degree of the thinness of the disease. In addition, it is more common among those involved in activities that value a high level of thinness like athletics, modeling, and dancing. Anorexia often starts after a major life-change or stress-inducing event. Very little weight is required for diagnosis. The severity of the disease is based on the body mass index (BMI) in adults, which has BMI of more than 17, BMI of 16 to 17, BMI of 15 to 16 and less than 15 BMIs have serious BMI. Children are often used for BMI of less than 5 percent.
Treatment of anorexia involves gaining healthy weight, treating underlying psychological problems, and addressing behaviors that promote the problem. While medicines do not help with weight gain, they can be used to help with associated anxiety or depression. Many types of therapy can be useful, such as cognitive behavioral therapy or an attitude where parents take responsibility for feeding their child known as Maudsley family therapy. Occasionally people are required to enter the hospital to lose weight. Evidence for profit from feeding the nasogastric tube, however, is not clear. Some people will have only one episode and will be fine while others can have several episodes. Many complications improve or resolve with reducing weight.
Globally, anorexia is estimated to affect 2.9 million people by 2015. It is estimated that from 0.9% to 4.3% of women and 0.2% to 0.3% of the Western countries, at some point in their life. About 0.4% of young women are affected in a year and it is estimated that women and men are ten times more. Rates are unclear in most developing countries Often it begins during adolescence or young adulthood. While the anorexia was diagnosed more commonly during the 20th century, it is not clear whether it was due to an increase in its frequency or better diagnosis only. In 2013, its direct result was around 600 deaths globally, more than 400 deaths in 1990. Due to eating disorders, suicide due to other causes increases the risk of death of a person. About 5% of people with anorexia die of complications in a ten-year period, about six times the risk increases.