Types of Acne
Classifications of Acne
Types of Acne - NON-INFLAMMATORY ACNE
Closed comedo, or whitehead. If the plugged follicle stays
below the surface of the skin, the lesion is called a closed
comedo, or whitehead. They usually appear on the skin as
small, whitish bumps.
Open comedo, or blackhead. If the plug enlarges and pushes
through the surface of the skin, it's called an open comedo,
or blackhead. The plug's dark appearance is not due to dirt,
but rather to a buildup of melanin, the skin's dark pigment.
Types of Acne - INFLAMMATORY ACNE
Papule. The mildest form of inflammatory acne is the papule,
which appears on the skin as a small, firm pink bump. These
can be tender to the touch, and are often considered an
intermediary step between non-inflammatory and clearly inflammatory
Pustule. Like papules, pustules are small round lesions;
unlike papules, they are clearly inflamed and contain visible
pus. They may appear red at the base, with a yellowish or
whitish center. Pustules do not commonly contain a great
deal of bacteria; the inflammation is generally caused by
chemical irritation from sebum components such as fatty
Nodule or Cyst. Large and usually very painful, nodules
are inflamed, pus-filled lesions lodged deep within the
skin. Nodules develop when the contents of a comedo have
spilled into the surrounding skin and the local immune system
responds, producing pus.
The most severe form of acne lesion, nodules may persist
for weeks or months, their contents hardening into a deep
cyst. Both nodules and cysts often leave deep scars.
Acne conglobata. This rare but serious form of inflammatory
acne develops primarily on the back, buttocks and chest.
In addition to the presence of pustules and nodules, there
may be severe bacterial infection.