Hyperpigmentation after any laser treatment is typically secondary to inflammation and thus is called post-inflammatory hyperpigmentation or PIH.
PIH is more common in darker skin types and sometimes is an expected outcome after laser treatment. In my experience, PIH almost always goes away with time and I have found it to be very treatable. Treatments include sun protection, topical anti-inflammatory creams (such as the Elidel you are using or topical steroids like the momethasone), hydroquinone with or with out tretinoin (retin-a) and/or glycolic acid/ AHAs, and chemical peels. Patience combined with topical creams usually gives a very good outcome.


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