How long does it take for an eating disorder to develop?

weather it's
bullmia
anorexia
or any other that you know off..

Causes
It's not known with certainty what causes eating disorders. As with other mental illnesses, the possible causes are complex and may result from an interaction of biological, psychological, family, genetic, environmental and social factors. Possible causes of eating disorders include:
* Biology. Some people may be genetically vulnerable to developing eating disorders. Some studies show that people with biological siblings or parents with an eating disorder may develop one too, suggesting a possible genetic link. In addition, there's some evidence that serotonin, a naturally occurring brain chemical, may influence eating behaviors because of its connection to the regulation of food intake.
* Psychological and emotional health. People with eating disorders may have psychological and emotional characteristics that contribute to the disorder. They may have low self-esteem, perfectionism, impulsive behavior, anger management difficulties, family conflicts and troubled relationships, for instance.
* Sociocultural issues. The modern Western cultural environment often cultivates and reinforces a desire for thinness. Success and worth are often equated with being thin. The media and entertainment industries often focus on appearance and body shape. Peer pressure may fuel this desire to be thin, particularly among young girls.

It can happen just like that, or slowly. It depends on what triggers it. If you were living your life just normal, and suddenly someone said a comment abt your appearance that really impacted you, in that split second the seed has been sown for the eating disorder. So it can happen that quick.

Judging by the size of my stomach about 40 years.