There is extreme hyperpigmentation around my mouth and nothing works. Please help. (photos)

Hydroquinone did nothing except bleaching the area around it. Tretinoin .25% and .5% made it peel but there wasn't a significant difference, and I had to discontinue using it after it almost burned my upper lip. Most advice columns list moisturizing regularly as an effective solution but even that did not work. There is absolutely no difference no matter what I use.

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