Compulsive overeating may start slowly. For example, a child may turn to food when they are upset. Over time, the child learns that food helps soothe upset feelings.
The disorder may occur when others make repeated negative comments about a person's weight. It may occur after a traumatic event in childhood, or after restrictive dieting. A person's home environment also can play a role. For example, a person's parents may have been too controlling or were not present. A person may not have had good role models for eating.
Compulsions often follow obsessions, which reduce anxiety. So obsessive thoughts of low self-worth, being overweight, or dieting can set off the compulsion to eat.
The more weight a person gains, the harder the person may try to diet. Commonly dieting is what leads to the next binge.