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Signs
These are some of the many signs that may indicate whether someone has bulimia nervosa:
 * fixation on number of calories consumed
 * fixation on and extreme consciousness of weight
 * low self-esteem
 * low blood pressure
 * irregular menstrual cycle
 * constant trips to the bathroom
 * depression
 * frequent occurrences involving abnormally consuming large portions of food

As with many psychiatric illnesses, delusions can occur with other signs and symptoms leaving the person with a false belief that is not ordinarily accepted by others.

The person may also suffer physical complications such as tetany, epileptic seizures, cardiac arrhythmias and muscle weakness.(ICD-10).

People with bulimia nervosa may also exercise to a point that excludes other activities.

Related disorders
Bulimics are much more likely than non-bulimics to have an affective disorder, such as depression or general anxiety disorder: A 1985 Columbia University study on female bulimics at New York State Psychiatric Institute found 70% had suffered depression some time in their lives (as opposed to 25.8% for adult females in a control sample from the general population), rising to 88% for all affective disorders combined. Another study by the Royal Children's Hospital in Melbourne on a cohort of 2,000 adolescents similarly found that those meeting at least two of the DSM-IV criteria for bulimia nervosa or anorexia nervosa had a sixfold increase in risk of anxiety and a doubling of risk for substance dependency. Some sufferers of anorexia nervosa exhibit episodes of bulimic tendencies through purging (either through self-induced vomiting or laxatives) as a way to quickly remove food in their system. Bulimia also has negative effects on the sufferer's dental health due to the acid passed through the mouth from frequent vomiting causing acid erosion, mainly on the posterior dental surface.