Harmony Xl Pro

Laser hair removal methods can be divided into 3 categories:

1. Laser non-selective damage hair removal method, such as CO2 laser hair removal, this method is time-consuming and easy to form scars;

2. Photodynamic therapy, such as oral or topical use of α-aminocaproyl propionic acid followed by laser irradiation, this method seems feasible in theory, but it has very few clinical applications;

3. Selective photothermal hair removal, namely laser and intense pulsed light hair removal.

The principle of modern laser hair removal machine is based on the principle of "selective photopyrolysis" proposed by American doctors Aderson and Parrish in 1983: a certain wavelength of laser light penetrates the epidermis, enters the dermis, and is selectively covered by hair and hair follicles. The melanin particles absorb and produce light and heat effect, and the heat energy in the hair is conducted to the surroundings, completely destroying the "hair roots" such as hair follicles and stem cells, resulting in permanent hair removal. The normal tissues around the hair follicles do not contain melanin particles, so they do not absorb this laser, so the impact is minimal and generally does not cause paralysis.

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