Ballooning is when air gets trapped in the ostomy bag, as your digestive system produces wind. This causes the pouch to inflate - just like a balloon.
If your pouch has a deodorising filter, it allows you to let out the air without letting out odour as well. Be sure not to wait too long before changing your bag, as the filter might start to get clogged over a few days.
How to reduce ballooning
As ballooning is caused by gas in your digestive system, it's a good idea to cut down on drinks and foods that cause gas. These include fizzy drinks, some vegetables and chewing gum.
Before use, always consult the 'Instructions for use' document delivered with the products