Can hypopigmentation be reversed? (photo)

8 wks ago, I showed my derm tiny red itchy bumps on my shin. She said eczema. Then she said WARTS! Before I knew, she froze my shin w/ nitrous oxide. Now, hypopigmentation: patch of WHITE skin shaped like Florida. I called them to ask about it. A nurse said come in for an appt. Why, So they can push cosmetic treatments? I used scar gel on the white skin. Nothing. Tried self-tanner. It darkened the skin AROUND the scar! Is there ANY way to get that white skin to catch up to the normal tone?

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