How your skin ages will depend on a variety of factors: your lifestyle, diet, heredity, and other personal habits.
According to the above photo
Free radicals attack surface environment damage is high. Constant exposure to the sun & fast life style leads to skins premature aging.
First signs of aging appear dull, lackless, lifeless skin. Skin regeneration is reducing leading to dull complexion & uneven skin tone. Use of harsh skin care can become apparent. Elastin degradation can show first signs of aging appear.
Significant dullness, aging & dark spots. Skin sensitivity. Skin thinning can cause sensitivity, redness, dry, oily, sudden redness. Photo aging appears – dark spots – more prominent signs of aging appears.
Significant tension decreases moisture retention slowing. Decrease in surface tension impairs skin structure and ability to defend itself. Barrier lessens leading to less efficiency in retaining moisture. Combined with excessive dryness sometimes accompanied by adult acne.
Source: http://www.mediluxegulf.com/mediluxe-beauty-corner/how-the-skin-changes-with-age by Lauren Hayward