If your foot slides forward (heel gapping above), while wearing high heels when walking on even a slight incline, 9 times out of 10, the balls of your feet will hurt. Trying to cushion or pad this forefoot area inside the shoe will only make it worse.
When wearing high heels, the shoe has to fit snug or you’ll slide. The best way to accomplish this is making sure your heel to ball matches the shoe’s heel to ball and if you slide, use Wiley’s felt remedy in the vamp and not a metatarsal pad.
If you slide, not only will the widest part of your foot move forward into the tapering toe, but you will also lose contact with the arch and your base of support. Ouch!
Dr. Jenny Sanders Shoe Blog 