uvb rays penetrate into the skin layer and damage woman face on white background.

aesthetic affect aging background blemish cancer cell collagen damage dermatology dermis dna elastin epidermis face freckle hyperpigmentation illustration inflammation infographic into layer melanin melanocyte melanogenesis melasma penetrate pigment pigmentation premature protection radiation rays red skin spot sun sunblock sunburn sunlight sunscreen tanned ultraviolet uva uvb vector wavelength white woman wrinkle