Often but not always, but if it becomes a daily habit it could become an eating disorder.
Not usually, but rarely it might be a sign.
If you are not hungry, that is not a sign of an eating disorder. Not eating because you think you are fat can be a sign of an eating disorder. Most people with anorexia or bulimia have body dysphoric disorder, where they cannot really judge how they look. Regardless, skipping meals is unhealthy at any level.
It is very likely and possible. An intense fear of gaining weight and a habit of skipping meals is a common sign of anorexia, and the purging (throwing up) after meals is also a sign of another eating disorder known as bulimia.
Not in and of itself, but eating disorder do often involve obsessive calorie counting.
Yes, if you are purging, you have an eating disorder. Period.
Fear of eating and gaining weight is a common sign / symptom of an eating disroder.
Not eating / starvation is usually a sign of the eating disorder known as anorexia.
Not in and of itself, but not wanting to eat can often be a sign of an eating disorder or a much more serious health problem.
Eating non-food items can be a sign of the eating disorder known as pica.
Yes, that's usually a common sign of compulsive overeating or binge eating.
No, but eating non-food items can be bad for your health and digestive system and a sign of an eating disorder known as pica.
No, as that is a sign of the dangerous and often deadly eating disorder known as anorexia nervosa.
It's hard to say. While throwing up after meals is a sign of an eating disorder called Bulimia, there are other causes. Certain medical conditions, medications, allergies, or food poisioning are possible, to name a few.