Does Laser Beauty Treatment Work?（Part 1)

Laser Beauty Treatment, in fact, is called the clinical treatment of skin diseases with pulse laser in the medical field. Because the equipment is simple to operate, the operating threshold is low, the effect is good, and the cycle is short, consumer demand is strong, and the road to commercialization is particularly rapid. Laser beauty products and advertisements are overwhelming, and it has become a skin care method similar to daily skin care. In fact, this is an emerging clinical discipline, and laser treatment of cosmetic dermatology is only in its initial development stage in my country.

The principle of laser beauty is mainly based on the different reactions of skin tissue to laser: photochemical reaction and heating reaction. Photochemical reactions are because the energy of photons can activate chemical bonds in cell molecules, thereby stimulating specific chemical reactions. The well-known skin tumors are the products of photochemical reactions. But so far, most of the applications of laser in dermatology make use of the heating reaction caused by laser. When the temperature rises, most molecular structures of organisms will denature, leading to cell necrosis, hemostasis and changes in the extracellular matrix. The purpose of treatment.

We are now exposed to the most laser beauty projects, which are wrinkle removal, skin rejuvenation/skin repair, freckle removal, tattoo removal/eyebrow removal, hair removal, tumor cutting, microvascular lesions, etc. However, since everyone is more often exposed to beauty projects that are done simply to become beautiful, we will talk about laser wrinkles, skin rejuvenation/skin repair, freckle removal.

Wrinkle Removal & Skin Rejuvenation
In fact, the technical principles of wrinkle removal and skin rejuvenation are the same. Although there are two different technologies based on the laser effect and whether the skin causes epidermal exfoliation: ablative laser skin rejuvenation technology and non-ablative laser skin rejuvenation technology. However, both mechanisms use the absorption of laser light by water molecules in the skin to cause the temperature of the irradiated area to rise sharply, thereby damaging the epidermis and part of the dermis. The collagen fibers in the dermis shrink when heated, and at the same time activate fibroblasts to synthesize new collagen, forming Epidermis regeneration and dermis remodeling, and collagen fibers can quickly shrink to 1/3 of their original length at 55-6O0°C, achieving the purpose of removing wrinkles and making the skin plumper. Here are the common wavelengths and pros and cons of both technologies:

But what you may hear more about is fractional laser. What is that? In fact, fractional laser technology is a laser use method published by laser medicine experts at Harvard University in the United States that specifically combines the advantages of the two technologies. It uses an array of beams to form a tiny thermal damage area, but normal skin tissue is left between each laser point, which can speed up skin repair and make it less likely to leave traces. However, fractional laser technology is also divided into ablative fractional laser and non-ablative fractional laser. Their advantages, disadvantages and wavelengths used are similar to traditional laser technology, but the advantages are amplified and the disadvantages are weakened:

Freckle Removal
The principle of laser freckle removal is that melanosomes and pigment cells containing melanin absorb laser light of a specific wavelength and undergo instantaneous thermal expansion, thereby generating pressure waves that cause the pigment particles in the epidermis or dermis to break. Due to the different penetrating capabilities of lasers of different wavelengths, the tissues in the skin react differently after being irradiated. Different wavelengths and different types of lasers will be used for different pigment spots. However, since continuous lasers cause greater damage to the tissue structure and It is easy to leave scars, so pulse laser is more often used for treatment. The following are common wavelength lasers used in clinical applications and their corresponding characteristics;

It should be noted that before removing freckles, you must focus on distinguishing the type of spots, so that you can find the corresponding wavelength for treatment. In addition, the effect of laser treatment on some spots is not significant, such as coffee-milk spots, chloasma, This is because there are many factors that cause chloasma, including hormonal disorders, daily exposure, chemical ingredients in cosmetics that affect the balance of facial microorganisms, or genetic genes. If laser treatment is used arbitrarily, it will not only fail to eliminate it, but may even aggravate pigment deposition and cause plaques. More obvious and stubborn. In addition, other plaques such as senile keratosis may be manifestations of precancerous lesions. It is recommended to go to the hospital for consultation and examination. Simply relying on laser elimination is not advisable.

1. Does laser beauty have no side effects?
No, although laser cosmetic surgery is non-invasive and has minimal side effects, it does not mean that it does not have any side effects, because the essence of laser cosmetic surgery is thermal damage to different tissue cells of the skin. If the power is too high, used improperly, or due to personal constitution, Due to the different absorption effects of laser, erythema, purpura, blisters, scabs or pigmentation often occur.
⒉Can laser beauty be done once and for all?
No, because people’s physiques are different and their responses to laser are also different. Most skin problems will have recurrence problems. And for hereditary skin problems, we can only treat the symptoms but not the root cause. For example, freckles are mostly caused by Once the skin folds appear multiple times due to genetic reasons or wrinkles, they will appear again.
3. Will laser beauty cause skin thinning?
No, the two basic principles of laser are biological action and photothermal effect. To be more precise, it uses local thermal effect to irradiate part of the skin tissue and specific locations. If the skin feels thinner, it may be due to the loss of collagen. Not as tight.
4. Why does it turn black easily?
Because the skin is highly sensitive after photorejuvenation/skin laser beauty treatment, it is easy to produce melanin after being stimulated by light. This will lead to pigmentation and photoaging of new skin. Therefore, necessary physical sun protection measures must be taken after laser cosmetic surgery. If no skin damage occurs after the surgery, sunscreen can also be used appropriately to greatly enhance the sun protection effect.

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