Flying with a colostomy bag can be a bit nerve-wracking, especially if it's your first time. You might be concerned about how the changes in cabin pressure could affect your pouch, like causing it to inflate or "balloon." Here are some helpful tips and insights from experienced travelers to ease your mind:

1. Ballooning and Cabin Pressure
- Many travelers have found that their pouches do not balloon due to cabin pressure changes, even in high-pressure environments like hyperbaric chambers.
- It's a good idea to empty your pouch before boarding. If gas builds up during the flight, you can use the lavatory to release it.
- Consider using a vented pouch, or you can manually vent it if needed.
- To minimize gas, avoid carbonated drinks and foods that produce gas before and during your flight.

2. Seating and In-flight Routine
- Booking an aisle seat can make it easier to access the restroom.
- When emptying your pouch on the plane, place a bit of toilet paper in the toilet first to reduce noise and splashing, and be prepared to flush multiple times.
- Some travelers bring a small bottle of water to rinse their pouch when emptying.

3. Security Screening (TSA and Other Airports)
- Walk-through metal detectors usually don't detect the pouch, but full-body scanners will highlight it.
- Typically, an agent will ask about the pouch, and you can explain it's an ostomy bag. You'll rub your hand over the area, and they will swab it for explosives—this is usually quick and discreet.
- Sometimes, security staff might misunderstand supports like an ostomy belt, so stay patient and explain calmly.
- Experiences vary, but some travelers have been asked to enter a curtained area or show the pouch, although U.S. rules prohibit agents from requiring a visual inspection.
- Carrying an ostomy ID card or travel certificate can help speed up explanations, as they are accepted by TSA and most international security staff.
- Aerosol supplies and accessories generally pass without issue, but declare them if asked.

4. Miscellaneous Tips
- Activities like hyperbaric oxygen therapy, skydiving from unpressurized aircraft, and long-haul flights have been completed without pouch issues.
- If a balloon does form, flush while releasing gas to help clear any odor.
- Maintain patience and courtesy with security staff to avoid extra scrutiny.

These tips should help you feel more prepared and confident for your flight. Safe travels!