cross section of freckles on skin layer on white background.

freckles skin pigmentation hyperpigmentation face melanin melanocyte small flat spots overproduction comparison cross body sun exposed ephelides solar lentigines actinic discoloration complexion disorder genetic dark brown melanogenesis pigment hormone layer cell epidermis dermis sunburn exposure vector infographic design diagram inflammation unhealthy dermatology beauty treatment care damage lesion change ultraviolet light childhood summer aesthetic anatomy melasma isolated white background types pink font line brand pattern circle purple advertising organ petal magenta cartoon presentation label violet