Hello, I underwent a successful 90% TCA Peel to remove this cholesterol deposit (Xanthelasma) I had on the tear trough area. Once the scabbing fell off, I am not sure what I should be applying to avoid pigmentation(other than SPF50). Area is now pinkish-dark purple, like a bruise. I have these products, Hydroquinone, VitaminC, Tretinoin, AlphaArbutin, SiliconGel, Kojic Acid But worried to use them on thin skinned area. Is Niacinamide or Azelic Acid safer? Please let me know of your opinions.