Hypertrophic scars appear weeks following an injury, while keloid scars develop months to years later. Some patients have a higher risk of developing hypertrophic and keloid scars, such as those with darker skin tones, a family history of forming hypertrophic and keloid scars, a wound in a high-risk location, and a tensely closed wound. The first lasers explored for treating hypertrophic and keloid scars were the 1060-nm Nd:YAG and argon lasers. Since those investigations, the pulse dye laser has shown some promise.
- Surgical scar
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