The skin is the largest and most exposed organ of the body. Under continual attack from outside influences your skin can become sensitive and damaged, with pigmentary problems particularly common. Most people will acquire pigmentary lesions at some time or another, whereas some are born with congenital pigmented conditions such as birthmarks, moles etc.
IPL, Intense Pulsed Light, can be used to diminish the pigmented lesions caused by sun damage.
The effects of the sun and the natural ageing process causes damage to the skin over time.