Low self esteem in overweight people will usually begins with cause of the obesity. Stress was the major cause of weight gain, not only in women, but also in men. In other words, stress will leads to lack of the confidence which turns into feeling of being unable to cope, which finds in escape of distractions like excessive eating & drinking results in weight gain. Some, of the persons who are putting on weight was already predisposed to the self confidence & esteem issues.
Another main cause of the low self-esteem was to have negative view of their own physical appearance. Some of the people dont like their own physical appearance, their bodies don't comply with prevailing standards of the beauty or even nature. Obesity & overweight were among the factors which are typically found as root of many cases of low self-esteem, but till now it is suggested that reverse is what actually happens in the people with low self-esteem was more likely to gain weight or obese.