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What is the principle of laser hair removal, and what are the advantages and taboos?

Time : 2022-02-17 Hits : 6

At present, the most widely used hair removal technologies are laser hair removal, photon hair removal, and what we often call ice cooling hair removal and sapphire hair removal. They all belong to the category of laser or photon hair removal. Laser hair removal uses a specific laser to selectively heat the hair follicle tissue, so as to achieve the effect of hair removal without damaging the surrounding tissue.

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Principle of laser hair removal:

 

Hair follicles in growth stage are rich in melanocytes, which can selectively absorb light of specific wavelength and convert it into heat energy. When the heat energy enters the hair follicle along the hair stem, the melanin in the hair follicle will be destroyed, so that the hair follicle will lose its activity and inhibit the growth of hair.

 

Growth cycle of hair follicle:

 

The growth cycle of hair follicles includes growth period, quiescent period and decline period. Not all hair follicles are in the same period, so depilation needs to be carried out several times.

 

What are the benefits of laser hair removal?

Laser hair removal will not damage the skin and sweat glands. After the laser reaches the dermis, it will be selectively absorbed by the melanocytes of hair and hair follicles, while other tissues around hair follicles will not absorb color light and will not be damaged. The operation gear and time of laser hair removal can be controlled according to their own habits, which is very convenient for people with a lot of hair.

 

Who should not choose laser hair removal?

People with allergic constitution: people with allergic skin and taking photosensitive drugs should not undergo laser hair removal to prevent allergic dermatitis. People with darker skin color: people with darker skin color should be cautious when choosing laser hair removal, because melanin in the skin will absorb part of the laser, which may induce pigmentation or lighten the skin color.