My top lip is darker than my bottom lip, as well as the corners of my mouth. Are there any treatment options? (Photo)

I asked my GP about options available to make my lips more pink and even in colour for both upper and lower lip and she told me that my options are; permanent tattoo makeup and hydroquinone cream. My concern is that I have read online hydroquinone is not suited for lips and there isn't much evidence it is effective for pigmentation on the lips. Are there any other treatment options? Only I in my family have this problem and it is starting to get me down.

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