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Skin health insights authored directly by board-certified dermatologists. Explore more articles on our Naver Blog and Instagram.
Melasma, Freckles, and Age Spots: What Are the Differences?
Although all appear as brown spots, their underlying causes and tissue depths differ significantly. Melasma spreads broadly across both cheeks influenced by hormones and UV exposure; freckles are scattered small spots driven by genetic predisposition; and age spots (seborrheic keratoses) are raised lesions that thicken with age. Because the ideal laser modality and session count vary by condition, differential diagnosis by a board-certified dermatologist is essential.
Acne Marks: Why Red and Brown Spots Require Different Approaches
Red marks left after acne heals stem from capillaries dilated by inflammation, whereas brown marks are caused by post-inflammatory hyperpigmentation (PIH). Red marks require vascular lasers and brown marks call for pigment lasers to address their root causes, with diligent sun protection being the single most crucial step to prevent lingering pigmentation.
Why Sun Protection Is Vital Following Laser Treatments
Immediately following laser therapy, the compromised skin barrier becomes remarkably sensitive to UV rays. Sun exposure during this vulnerable window can darken existing pigment or trigger new hyperpigmentation. For at least 2 to 4 weeks post-procedure, reapply an SPF 30+ sunscreen every 2 to 3 hours and use wide-brimmed hats or sun umbrellas.
When Is the Best Time to Begin Scar Treatment?
For scars resulting from surgery or trauma, clinical outcomes are best when treatment begins 4 to 8 weeks after the wound has closed. Intervening with lasers during this critical window prevents scar tissue hypertrophy and eases vascular redness, reducing both the overall sessions and cost compared to treating fully matured scars.