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Description
Both patterns are normal
Mast cells also produce chemokines such as CCL3, which signal monocytes and neutrophils to the area

Tretinoin helps exfoliate the skin by increasing cell turnover rate

Most patients begin to see early changes between weeks 4 and 6 after the first session, with full results evaluated at 12 weeks

Nat Rev Mol Cell Biol 17:564580

Yes, for fair to medium skin tones, Fraxel is the best choice for removing hyperpigmentation (dark spots), brown spots, and sun damage
