Table. Benign clinical symptoms of chronic light damage (modified from Yaar 2007 [e9]—a selection).

Benign clinical symptoms	Changes in the epidermis and dermis, especially in areas of maximum exposure*
Dry skin	Thickening of the skin barrier and changes in the epidermal proliferation rate
Pigmentary changes: irregular pigmentation senile lentigo idiopathic guttate hypomelanosis	Both increase and decrease in epidermal melanocytes, increase in dermal melanophages
Changes in the connective tissue – wrinkles and elastosis	Changes in the connective tissue, especially collagen and elastic fibers
Telangiectases Purpura (easy bruising)	Proliferation of small vessels often with atrophic walls, extravasation of erythrocytes and perivascular inflammation
Comedones (Favre-Racouchot disease) and sebaceous gland hyperplasia	Dilation and cornification of the superficial component of the sebaceous follicle, proliferation of sebaceous glands

^*Areas of maximum exposure: head and scalp (including helices, lower lip), décolleté, shoulders, backs of hands, forearms