acne. whitehead. cross-section of a human skin with hair follicle

acne anatomical anatomy bacteria bacterial biology blackhead care cell clogged comedo comedone cosmetic cosmetology crosssection dermatology dermis diagram disease disorder epidermis face follicle formation furuncle gland hair human illustration infection inflammation infographic layer medical medicine physiology pimple pimples pore poster problem pustule scar science sebum section skin skincare structure surface top treatment type vector view white whitehead