It is easiest to change your pouching system when your stoma is quiet. Sometimes this is first thing in the morning before breakfast, coffee or tea. Eating food will cause contractions of the digestive system from top to bottom, which will increase the amount of output. Coffee and tea contain compounds that irritate the bowel and make output liquid. The more formed your output, the easier it is to manage while changing.
If you may have a very active stoma while trying to change your pouching system, sometimes it’s best just to let it run and apply your pouching system when it is quiet for a moment. Another strategy is to use fast-acting loperamide (Imodium) to slow the output enough to apply a pouching system.