Acne

Acne happens when pores get clogged with oil, dead skin cells and bacteria. Types of acne are whiteheads which are under the skin, blackheads which are open on the surface and turn dark from being exposed to air,  then there are inflamed types which can red bumps without pus called papules and with pus called pustules or deeper, painful, severe and larger called nodules and cysts or pimples. Acne is most common among teenagers, though it affects people of all ages.