The following guidance is for child aged players only.  As of right now, we do not have guidance for adults.

Children who have issues with incontinence are likely to experience anxiety with regard to their condition, and embarrassment if an accident occurs.  

Discreetly inform the child that they are always welcome to excuse themselves to use the facilities.  Additionally scheduling regular breaks over shorter periods of time where children are encouraged to get up, move around, and use any facilities.  This should help to mitigate accidents.  

If an accident occurs, do not overreact.  Calmly escort the child to a restroom and follow instructions laid out by the guardian about how to respond.  Remove any furniture that may have been soiled to be taken care of at a later time if possible so that the disruption is minimized.  As always communication is integral, to acceptance.