You (presumably a friend of family member) do not treat someone who has an eating disorder. You cannot simply talk somebody out of a mental or emotional disorder. Some treatment options include individual, group, &/or family psychotherapy, medical care & monitoring, nutritional counseling, & medications.
someone, who has a disorder eating.
Tell them.
Yes. Secrets are part of the disorder.
No, it's mental, a pill can't cure it.
They would lack normal eating habits.
Yes, anyone may experience an eating disorder for many reasons, including stress or poor self image. If you are bipolar and suspect that you have an eating disorder, this is something to discuss with your therapist and/or medical doctor.
The eating disorder known as EDNOS (Eating Disorder Not Otherwise Specified) is usually diagnosed to someone that is struggling from eating disorder behaviors but does not have the symptoms of bulimia or anorexia. Some symptoms of EDNOS include constant concern about food and weight, behaviors such as restricting eating or that compensate for eating (like exercising or purging).
Tell your family they will help you! Otherwise I would look online about how to treat this problem.
Consult them about it. Its very bad for their health.
No. Obesity is a state that someone can be in. It means that someone has too high of a fat content to be healthy. Someone who is fat may not have any eating disorder - no matter how big they are. Eating disorders can include, but are not limited to: Anorexia (lack of eating), Bulimia (puking up what you eat, usually coupled with over eating), and Binge Eating (eating large amounts of food at once).
Because this is a medical issue, the first person to ask is your family doctor. If they can not help you directly, they will send you to a person who can determine if you have an eating disorder and help you if you do.
Can you have an eating disorder without knowing: yes Can you have an eating disorder without trying: yes Eating disorders are mental illnesses, not weight-loss aids, people don't develop an eating disorder on purpose. Often they won't know or believe that they are ill, which makes them difficult to treat. I don't know if this is what you were asking, the question is quite vague. So if this doesn't answer your question feel free to clarify.