Hi,
Acne Vulgaris is the most common form of acne which includes several types of pimples. These
acne lesions include blackheads, whiteheads, papules, pustules,
nodules and cysts.
Whiteheads result when a pore is completely blocked, trapping sebum (oil), bacteria, and dead skin cells, causing a white appearance on the surface. A pustule is similar to a whitehead, but is inflamed, and appears as a red circle with a white or yellow center.