Many cosmetic procedures are performed using lasers. Some of the most common include:

• Laser resurfacing (“laser peel”). A carbon dioxide (CO2) or Er:YAG laser is used to remove layers of wrinkled or damaged skin. The laser evaporates the water present in the skin, resulting in removal of the skin's top layers and tightening of the lower levels. This is most commonly performed to minimize the appearance of fine lines around the mouth and eyes. It may also be used to treat facial scars or to correct areas where skin color (pigmentation) is uneven. Laser skin resurfacing can be performed on an isolated region or across the entire face. It is often done along with other cosmetic procedures (e.g., facelift).
  
  
• Hair removal. Lasers remove unwanted hair by targeting melanin, the pigment that is found in hair follicles and is responsible for hair color. The energy absorbed by the melanin is converted to heat. This rise in temperature destroys the follicle, causing it to stop or lessen hair growth. Multiple treatments may be required to permanently remove unwanted hair.
  
  
• Tattoo removal. Lasers remove or diminish the appearance of tattoos by delivering high-energy bursts of light in short pulses that is absorbed by the tattoo ink. The laser energy causes ink particles to break apart. Multiple lasers of different intensity may be used for tattoos that are large or have a wide array of colors (as each color absorbs a different wavelength).