Everyone desires to have a clear and glowing skin, but many people suffer from pigmentation spots on the face. According to expert statistics, the Asia-Pacific region (especially China, Japan) people’s congenital pigmented diseases incidence rate is high, such as freckles, coffee spots, nevus of Ota (black face), nevus, etc., the incidence rate can be as high as 10%; other pigmented diseases, such as chloasma, zygoma (zygomatic nevus of brown and blue), age spots, warts, and other pigmented skin diseases of a higher incidence rate. And the incidence rate of skin vascular diseases such as hemangioma, bright red nevus and capillary dilatation is around 1%. These diseases plague people’s life, employment, marriage and psychology. With the rapid development of laser technology, it has changed the history of treating these diseases from the surface of the skin, and works from under the skin, which is fast, convenient, low trauma, and the effect is more considerable. Why can laser remove spots? The principle of laser spot removal is to use the laser light wave between 500-700nm (pigment is most easily absorbed) can instantly penetrate through the epidermis of the skin and reach the deeper layers of the skin, so that the pigment particles inside the skin are instantly crushed, and the crushed pigment particles are swallowed up by the macrophage cells of human body, and then discharged out of the body through the lymphatic circulation, and the pigment will be eliminated. To put it simply, laser is to irradiate the pigmentation, make the pigment decompose, and finally be discharged out of the body with the metabolism of the human body. Therefore, laser pigment removal is one of the effective methods to remove pigmentation completely. Why does laser pigment removal leave no scars? As the specific wavelength of laser can reach the diseased pigmented tissues through the epidermis and dermis, it only plays a role in the pigmented particles, and there is basically no damage to the epidermis of the skin, so it will not leave scars on the skin. Different wavelengths of laser light can be selectively absorbed by pigments (which can be black, blue, green, brown, red, brown, yellow, etc.) in the skin. It is like shining a torch through a glass window at night to illuminate something inside the house, and there is no damage to the glass, which means that laser spot removal is a treatment done inside the skin. Furthermore, the laser beam is small in area and passes through the skin in a very short time of milliseconds and microseconds, so the heat damage of the laser to the epidermis is very small, which is also the reason why the epidermis does not leave scars. What kind of spots are suitable for laser treatment? Different pigmented spots react differently to laser, some are suitable for laser treatment, while some do not react well to laser. Before choosing laser spot removal, patients should first go to dermatologist to confirm the type of pigmented spots, and then go to skin laser cosmetic center to know the type of pigmented spots, the number of treatments needed and the effect of the treatments before deciding whether or not to use laser to remove the spots. Generally speaking, nevus of Ota (black face), freckles, zygomatic spots (zygomatic brown-bronze nevus), age spots, and age warts are extremely effective. Melasma, coffee spots, pigmented nevi and moles also work better. However, pigmentation, melanosis, hairy epidermal nevus (Becker’s nevus), etc. have great individual differences in their response to laser treatment, and the number of laser treatments is not necessarily the same, so you can do localized experimental laser treatment first. Nowadays, laser technology can also be applied to acquired man-made skin diseases, such as eyebrow tattoo, tattoo, post-acne pigmentation, post-traumatic dust deposits and so on. Moreover, lasers also have the function of reducing pores and improving the overall quality of the skin, which is highly effective and favored by the public. Laser hair removal is also extremely effective and permanent. How to choose different lasers and treatments? For general pigmentation, dye lasers can be used for treatment. During the treatment, the physician will apply the light beam to the skin pigmentation area, and the patient will feel like a rubber band bouncing, and the pain is not great. As for the course of laser treatment, the more superficial skin pigmentation spots, such as freckles and blue-black tattoos usually require only 1 to 3 treatments to achieve satisfactory results, while nevus of Ota usually requires about 5 treatments (each with an interval of more than 3 months). Pigments in the dermis, such as zygomatic spots (zygomatic nevus of brownish-bronze), respond well to the laser and usually require 3 to 4 treatments. However, in the early stage of the treatment, there will be a period of pigmentation for a month or two, instead of being darker than before the treatment, and one must wait patiently for the pigment to subside. What do I need to pay attention to after laser treatment? Post-operative care is very important to ensure the efficacy of treatment and minimize recurrence. First of all, there may be different degrees of redness and swelling in the treatment area after laser surgery, this phenomenon is normal, as long as the ice can be relieved in time, so there is no need to panic. Secondly, it is better not to use cosmetics, aspirin and alcohol (including alcohol-containing skin care products) for one week after the operation, avoid squeezing and rubbing the treatment area, and washing face with water is the best choice. Will laser spot removal recur? Laser spot removal is very effective for existing spots, although nevus of Ota and tattoos will not recur after treatment, but in some pigmented diseases it is impossible to completely prevent the regeneration of spots, therefore, after choosing regular hospitals to perform professional laser spot removal surgery, postoperative care and maintenance is also the key to ensure that the effect of spot removal. Most importantly, you must do a good job of sun protection and avoid sun exposure, otherwise it will damage the delicate skin after the operation and cause the reappearance of pigmentation spots. Does laser treatment require hospitalization? The advantages of laser pigmentation removal are quite obvious, it has the advantages of short single treatment time, no need for hospitalization, no epidermal wound and less pain.