Papules occur when a pore becomes clogged with excess oil, bacteria, and dead skin cells. Papules may fill with pus and develop a white or yellow center resulting in the formation of pustules. Pimple ...

Acne is a skin condition characterized by clogged pores. When pores get clogged, it causes red lesions — which you know as pimples — to form on the face or other areas of the body, especially those ...