
What is the principle of laser scar removal?
I am 22 years old this year. I got a small scar on my hand as a child, and I want to remove it using laser treatment. I would like to know how laser scar removal works.

In general, laser scar removal works by applying laser energy of specific wavelengths to scar tissue on the skin, achieving the effect of improving or eliminating scars.
Lasers have high directionality and energy concentration. When the laser irradiates the scar area, different types of lasers are absorbed by various target substances within the scar tissue. The thermal effect generated by the laser can destroy blood vessels in the scar, reduce blood supply, and thereby inhibit excessive growth of scar tissue. For superficial scars, low-energy lasers can stimulate the metabolism of skin cells and accelerate the skin's self-repair process.
The laser penetrates the skin to reach the subcutaneous layer, transforming scar tissue from granular into powdery form, which is subsequently absorbed and cleared by cells. This process makes the scar gradually fade from deep to light and eventually disappear. This technology can repair scars of different tissues and varying severities without damaging surrounding skin tissue, offering broad applicability, rapid results, and minimal side effects.
However, it's important to note that the effectiveness of laser scar removal varies from person to person, depending on the type, size, and location of the scar, as well as the individual's skin condition and healing capacity. Additionally, multiple laser treatments may be required to achieve the desired outcome, and post-treatment skin care according to medical advice, along with sun protection, is necessary to minimize side effects and promote recovery.