- Closed or whiteheads: If a closed follicle is kept below
the skin surface, this inflammation is called “closed
acne” or a “whitehead.” Usually, they surface
to the skin as small white lumps.
- Open or blackheads: If the closed pimple is enlarged and
pushes itself to the outside surface of the skin, it’s
called a close acne or a blackhead. The problem with blackheads
appearance is nor exactly related to that of a dirty skin,
but of excessive melanin, thus the dark pigment of the skin.
- Furuncle: The most common type of acne with inflammation
is a furuncle, which surfaces the skin as a small pinkish
inflammation. They may feel sensitive to the touch and are
usually considered a step between infections without inflammation
and the clear irritated ones.
- With pus: As furuncles, these are small infections. However,
differently from furuncles, they are clearly irritated and
contain pus. They may have a colored base, with a yellowish
or whitish center. Pimples with pus usually contain a great
quantity of bacteria. In most cases, inflammation is caused
by the chemical irritation of sebaceous components, such as
- Lumps or nodules: Big and often sore, lumps are always irritated,
filled with pus and deep infections. Lumps are discovered
when the contents of a pimple outpour to the surrounding skin
and the local immune system starts reacting to it by producing
pus. This is the most severe case of acne and lumps may persist
for weeks or months, maybe aggravating into a deep nodule.
Both lumps and nodules usually leave deep scars.