What is this discoloration under my left eye, after having a xanthelasma burned off two months ago?(photo)

Two months ago a flat, yellowish xanthelasma was peeled off under my eye, by a tca peel. Post peel, the area swelled up immensely and became bright red. The doctor said it wasn't infected and to let it heal. The swelling went down in 2 weeks time and the crescent shape where the acid was administered, peeled off, leaving new skin. This bruise-like appearance hasn't diminished at all in two months. What happened and what can be done to correct this discolored skin and broken capillaries?

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