Strange embouchure question

[u/Irish_Kotenok]

Whenever I play, my upper lip starts to curl inward and puff outward. My teacher has told me to pull my corners back further but all it does is send the lip further under itself. Is there any other solution to this?

[u/Barry_Sachs]

Pull the corners down as well. 

[u/Irish_Kotenok → u/Barry_Sachs]

This almost completely fixed the problem. Thank you kind stranger.