Patients who have had prior stomach surgery, including hiatal hernia repair, lap band, or gastric bypass, are not eligible to receive the Gastric balloon. This is due to the increased risk of the balloon causing a perforation in the stomach. Even in patients without previous stomach surgery, some have experienced stomach perforations, but these typically occur after extended periods of side effects. The reason for this increased risk is because gastric bypass surgery alters the anatomy of the stomach, making it more susceptible to perforation. The balloon, which is filled with gas or saline, can put pressure on the weakened stomach wall, leading to a tear or perforation. If you have had a gastric bypass surgery, you should talk to your doctor about other weight loss options that may be more appropriate for you.In general, the intragastric balloon is a safe and effective weight loss treatment for people who are overweight or obese. However, it is important to talk to your doctor to make sure that you are a good candidate for the procedure. Here are some of the risks and benefits of the intragastric balloon: Risks: Nausea and vomitingAbdominal painInfectionPerforationBlockage of the intestinesBenefits: Weight lossImproved blood pressureImproved cholesterol levelsReduced risk of diabetesIf you are considering having an intragastric balloon placed, it is important to discuss the risks and benefits with your doctor. They will be able to assess your individual circumstances and determine if the intragastric balloon is right for you.I hope this helps. Please let me know if you have any other questions.