How to find concave polygons in a mesh?

Hi, I’m trying to use a Surface Deform mod and it’s giving me this error.
image

Is there a way to automatically identify concave polygons or highlight them in any way? I’ve tried edit->mesh->cleanup-> split conclave faces, among all the other options listed there, to no success.

This is the mesh I’m using, a button up shirt with some overlap. I can see some points where the mesh overlaps, but is there an easier way to spot these concave polygons? Thank you!

not concave

use the print addon to find some of the distortion in your mesh

happy bl

Thanks for the quick response, I’ll take a look at it.