Orthorexia Bigorexia: Harmful Behavior is Evolving

Eating disorders have evolved beyond traditional illnesses like anorexia, which involves inadequate food intake, and bulimia – excessive intake followed by purposeful purging. For example, orthorexia, a newer diagnosis, is defined as an unhealthy fixation with consuming only healthy or “pure" foods paired with an extreme belief that other foods are “bad.” Similarly, bigorexia is an obsession with building muscle through exercise and nutrition that is associated with a body dysmorphic mentality, where a person views him or herself as being too small or too skinny despite being very muscular.

http://health.usnews.com/health-news/blogs/eat-run/articles/2016-02-25/5-things-you-didnt-know-about-eating-disorders