The reasons for this disorder aren't completely well understood.
Some people seem to rely on food as a way of coping with stress or emotional problems.
Overeating may give them a sense of comfort. Most compulsive overeaters think a lot about food and their weight, which often leads to a cycle of dieting and bingeing. While on the diet, they feel hungry and deprived, which helps lead to the next binge. Some people see compulsive overeating as an addiction, similar to an addiction to drugs. Whatever the reasons, bingeing, isn't good for the body.