The correct procedure you are looking for is called gastric balloon. Gastric balloon is a treatment used to help with weight-loss by reducing the size of one's stomach. In order to determine whether you qualify for the treatment, you need to calculate your BMI (Body Mass Index).
You'll want to research several bariatric curgeons in your area, which you can do so through our site, and ask them about your specific situation.
The information on this site is not a substitute for diagnosis or treatment from a licensed medical practitioner. If you are experiencing a serious medical condition call your local emergency services or your doctor.