How Can I Fix Dark Scaly Skin Between Breasts? (photo)

As you can see in the pictures the skin between my breasts is very dark, and rigid-looking. The skin is very soft if I heavily moisturize, but if I dont it gets very dry. Ive had this concern for awhile, maybe 4-6 years. It isn't painful, but it has been an eyesore for too long.

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