Among the characteristic signs that the skin has begun to age, dermatologist Galina Zimmerman called the appearance of dark circles in the area under the eyes and a changed skin color.
Dermatologist Zimmerman said in an interview that circles under the eyes that do not go away even with sufficient rest and sleep are one of the external “age” markers. In addition, a characteristic change in complexion may occur. Losing youth, the skin of the face loses its radiance, shine.
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“The face looks dull, heterogeneous pigmentation appears on the skin,” the expert listed the characteristic signs of aging.
Galina Zimmerman added that when aging, the skin also loses good tone. If you pinch it with your fingers for a while, then it will restore its even smooth appearance after the existing fold for a long time afterwards – young skin is not afraid of creases, quickly acquires its former appearance. According to the expert, the long recovery of the skin after wrinkling, squeezing is a signal that the collagen fibers began to renew much more slowly.
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“Thickening of the skin with pore expansion and a change in facial contours are other clear signs of incipient aging,” the dermatologist added.
Earlier, the MedikForum.ru portal wrote that in ordinary life it can disrupt the liver. 
Galina Zimmerman Beauty cosmetologist , dermatologist