Anorexia commonly known as anorexia nervosa is characterized by a fear of weight gain, a distorted picture of the body resulting
in the autoprivación food. The causes are not yet known, however, it is usual to find such a disorder in adolescents who come from families sobreprotectoras, criticism and do not resolve their conflicts adequately. These adolescents are often inamduros emotionally and / or emotional problems. It is also unusual to find weight problems or depression or drug addiction in the families of those who suffer from anorexia. Presented moayormente in adolescents between 16 and 18 years. 1 in 100 women have anorexia (of which 5 to 10% are men). Prior was in May percentage in the middle class or high, but at present, occurs in all social strata and ethnicity. There are two subsets of the disorder. The subgroup restrictive, which reduces the intake of carbohydrates and fats and the subgroup of bulimia, which is eaten in excess, and to induce vomiting. The most common symptoms: low body weight, intense fear of weight gain, distorted image of his own body, for women, disappearance of 3 menstrual cycles without apparent cause, extreme concern in preparing food, ignore the sensations of hunger, denial to maintain a minimum weight normal, strange eating habits, excessive exercise. Among the physical symptoms (which may vary among those who suffer): dry skin, lethargy, fatigue, development of lanugo (body hair), demacración, abdominal pain, constipation, cold, yellowish skin and dehydration. These people may be introverted, irritable, as a variable depressed. The treatment will consist mostly of indivigual therapy, family, behavior modification and nutritional rehabilitation. Anorexia can lead to cardiovascular complications, hematologic, gastrointestinal, renal, endocrine and skeletal. Currently no known ways to prevent it, however, detection and treatment at an early stage can be keys to reducing the severity of symptoms.