Laser skin lightening or whitening/ brightening is a treatment that has gained popularity in the recent times. One such treatment is Q-switched or the Quality switched laser treatment. Q-switched laser uses wavelengths of 532 nm and 1064nm.
To lighten skin with the laser, a beam of light at wavelengths of 532 nanometers (nm) or 1064nm is applied to the skin. This high-intensity energy source is absorbed by melanin in the skin. The absorption destroys the dark spots and lightens the skin. Small dark spots can be treated in a few minutes. Larger areas may take more than 30 minutes. The wavelength of the laser can be adjusted to change the depth at which the laser should penetrate the skin. Depending on how much skin needs to be lightened, the patient may or may not be numbed with local anesthetic.
There are times when the results may not be as dramatic as one wants them to be. The difference in outcome and expectation is mainly because the outcome of the procedure depends on how your skin responds to the laser therapy. You may need multiple sessions to achieve the results that you are looking for.