It's a burn : The dark spots are probably not from the corn pads. Usually it's from pressure of the shoe pushing on the bone. The corn pads have acid on them and only cause burns. They are useless.
Answered 4/2/2013
5.2k views
Time: Corn pads contain salicylic acid. They can cause chemical burning and in some individuals, color changes. Give it a few weeks to see if they lighten. If not, see a podiatrist or dermatologist. An ultra-potent steroid may help but needs to be used under medical supervision.
Answered 7/4/2016
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