What is a gastric balloon?
A gastric balloon is a soft silicone balloon placed into the stomach and filled with saline or gas. By taking up space, it helps you feel full sooner and eat less. It is temporary — typically removed after 6 to 12 months — and is usually considered for people with a lower BMI than those who qualify for surgery, or who prefer a non-surgical option.
Who might consider it
- Adults with a BMI roughly in the 27–35 range who have not succeeded with diet and exercise alone
- People who want a reversible, less invasive option before considering surgery
- Those preparing for surgery who need to reduce weight first
The procedure
Most balloons are placed endoscopically (through the mouth, no incisions) under light sedation in around 20–30 minutes as a day procedure. Some newer balloons are swallowed as a capsule. A structured diet and lifestyle programme alongside the balloon is essential for results.
Results and what to expect
Outcomes vary, but many patients lose a meaningful proportion of body weight over the balloon period when combined with diet and exercise support. Because the balloon is temporary, long-term success depends heavily on the habits built during treatment. Nausea and vomiting are common in the first few days as the body adjusts.
Risks and considerations
- Nausea, vomiting and cramping in the first days
- Acid reflux or stomach discomfort
- Rare: balloon deflation or migration (requires prompt removal)
- Weight regain after removal if habits are not maintained
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View the shortlist →Frequently Asked Questions
Most balloons are designed to remain for 6 to 12 months depending on the type, then removed endoscopically. Your specialist will advise on the specific device and timeline.
Placement is done under sedation and is generally not painful. Some bloating, cramping or nausea is common in the first few days afterwards.
Weight maintenance depends on the diet and lifestyle habits you build during the balloon period. Ongoing support and follow-up improve long-term results.