Why does simethicone get rid of trapped gas?

Helps break up bubbl: Used for bloating pressure or discomfort and breaks up bubbles in gut, given after meals Simethocone is a adjunct in teatment of bloating, and frankly I have not had much succcess with this in my practice. Mainly because underlying factors such as aerophagia, belcihng, avoiding gaseous foods, smoking, chewing gum have to be stopped, before seeking help with medicines, which are mostly ineffective.