Quick Answer. When an electron absorbs energy, it will move up from a lower energy level to a higher energy level, called the excited state of the negatively-charged subatomic particle. However, the absorbed energy is released within a small interval of time and the electron moves down to its ground state.. Continue Reading.
1 Post-inflammatory hyperpigmentation (PIH) . 2  These are dark spots that occur as a result of trauma to the skin, which can be caused by psoriasis, burns, acne, and certain skin care treatments that are hard on the skin. Don't go out in the sun with citrus juice on your face, as this can cause it to burn. 2  Always follow package directions when using home treatments for dark spot removal. 3  Make sure to use plenty of sunscreen when using any type of skin lightening product.
And most of them are due to one cause: sun damage. The ultraviolet rays from the sun penetrate into the skin. There, they damage the elastic fibers that keep skin firm, allowing wrinkles to develop. Sunlight is also responsible for age spots or liver spots on the hands, face, and other sun-exposed areas.