I’m talking 100%? After how long? Then why have the surgery? And what happens to the skin’s appearance if you had plastic surgery to get rid of excess skin AFTER the bariatric surgery once you gain this weight back??

I am having Gastric bypass in less than a week and i know that I will have excess skin. I will probably have it where my love handles are, a little above the belly button. How much will gastric bypass effect the stretching of my skin? I am only 19 years old and currently weigh 261 pounds. The doctor told me it will not be as bad as an older person, but still i would like to know. Is there a way to get rid of excess skin besides more surgery?