One corner of mouth is under pigmented other is hyperpigmented.

In the winter my lips get really dry especially the corners and one time i guess i irritated it and now one side is lighter than the other like after a scab comes off just not as bad. How can I get it darker to match ny almond complection? the other sounds like post inflammation hyperpigmentation. How i get this normal? both issues are slight in appearance and don't really bother me so any non invasive/home remedies would be appreciated.

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