Follow these steps:
Select several shades of foundation
Angled brushes that are small with firm bristles allow for greater control.
Wash your face carefully to remove oils, dirt or old makeup.
Using the angled brush, draw a line of darker powder down each side of the nose
Use the darker shade of foundation over your nostrils near the bottom of your nose to create the illusion of shadow. Remember that subtlety is is key.
If the end of your nose is large or round, connect the two side stripes of dark foundation with an arrow shape