Whiteheads refer to a formation in the pore which remains closed and beneath the surface of the skin. One should never pop a whitehead, due to the probability of causing additional inflammation and
possibly a new and more severe pimple. Whiteheads appear on the surface of the skin as small raised bumps. Whiteheads often precede the formation of papules and pustules, although they may persist as whiteheads for some time.