Q. What causes excess fat or skin? Over-eating in general, eating too many fat-producing foods, excessive liquor consumption, and lack of exercise are the obvious causes of weight (fat) gain, but are not the only ones. Many women who gain excess weight during pregnancy are unable to get rid of unsightly bulges afterwards; if they don't plan to have more children, they may look for this type of surgical correction. Also, persons who have successfully lost a lot of weight via exercise and/or diet, or by gastric-bypass surgery, may end up with excess skin, and the only way to remove it is with a Beverly Hills Tummy Tuck. Photo courtesy of Jim Mutter, Director of Plastic Surgeon Marketing for Spore Medical