the difference between whitehead and blackhead acne .

acne whiteheads blackheads pimple skin comedone difference pore clogged blemish inflammatory closed open dark oil bacteria follicle sebum dead cells propionibacterium acnes face oxidation comparison spot care breakouts exfloliate scar bump inflammation hair sebaceous glands cause epidermis surface beauty dermatology aesthetic formation hormone treatment facial vector flat design concept infographic diagram problem