My skin is darker in the nasolabial fold, i don't have a wrinkle but two darker lines in this area, how can i improve that? i already use glycolic aci

4% hydroquinone: Glycolic acids help exfoliate the skin more rapidly to eliminate dead and damaged skin cells on the surface. Darkened skin is usually from excess pigment being produced deep in the skin. Use of a bleaching agent such as 4% hydroquinone may help smooth the color of the skin.

Consultation: Please call a skin specialist, a Dermatologist, for an examination, determination as to cause of your concern, and possible treatments. You really need to be examined by an expert.