The first signs of aging such as sun spots, crow’s-feet may show up earlier than we imagine, but the right treatments can make the difference. Dermatologists report that signs of aging may appear in age of 20s, and even the minor change in the skin’s appearance cause you to look older than your age.

A latest study in the Journal of the American Academy of Dermatology found that uneven skin tone makes you look older than with wrinkles.

The major cause of early aging is the sun, which deteriorate structure of skin’s supportive collagen and elastin fibers. “Photo aging, damage to skin caused by sunlight, accounts for approximately 80 percent of wrinkles. That’s why monks who live their lives in dark monasteries have skin like a teenager when they’re 80.” said Tina Alster, clinical professor of dermatology. Other bad factors include pollution, poor diet, inadequate sleep, and stress.