Em, my nose is kinda big and I remember back when my high school (freshman) photo was taken, the makeup lady did this very thing...which I didn't ask her to do. It made me realize I had a big nose, so I snorted nervously while she was doing it.Put a light line of concealer down the centre of your nose then put a darker colour (blend it slightly) down the sides. This will give the illusion of a smaller nose.