You may lose one half or more of your extra weight in the first 2 years. You will lose weight quickly after surgery if you are still on a liquid or pureed diet.

The inner band has a circular balloon inside that is filled with saline solution. The surgeon can adjust the inner band to resize the opening from the pouch to the rest of your stomach by injecting or removing the saline solution through a small device, called a port, that is placed under your skin.

The type of weight loss surgery that’s best for each individual will always come down to discussions with one’s doctor, as well as considerations around other medical conditions and an individual’s willingness to undergo such a life-altering procedure.

Your provider can guide you on a program that's right for you. And you can discuss how to exercise safely. This is important if you have physical or medical challenges or pain with daily tasks.

You may want to visit with a counselor to make sure you are emotionally ready for this surgery. You must be able to make major changes in your lifestyle after surgery.

Even then, you must meet certain criteria to be eligible for a bariatric procedure. These criteria are based on your body mass index (BMI) and whether you have any obesity-related health conditions.

If you are a member of an Asian population with one of these conditions, the BMI threshold for considering surgery is 25.

Work up to at least 30 minutes of aerobic exercise most days of the week. Some people may need more exercise than this to lose weight and keep it off.

Please share your experiences with weight gain after gastric bypass surgery. Your insights are invaluable to making sure other people have the information they need to meet their goals.

The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impact any of the editorial content on Forbes Health.

Dr. Patching also advises asking your doctor about how many years they’ve been performing bariatric surgery, how many operations they’ve completed and what types of techniques they will be using to perform the bypass surgery surgery. It’s also worth investigating whether the hospital where the surgery is performed is accredited.

Researchers say there are a number of reasons why alcohol abuse can begin after weight loss surgery.

Pneumonia. Pain can cause you to take shallow breaths which can lead to a lung infection, like pneumonia.

Another common concern, especially when you lose a lot of weight quickly, is the large amount of excess skin you may be left with as the pounds fall away. This is a common side effect of gastric sleeve surgery.