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Rosacea
used to be called 'acne rosacea' but it is quite different from
acne. There are red spots (papules) and sometimes pustules in both
conditions, but in rosacea they are dome-shaped rather than pointed
and there are no blackheads, whiteheads, deep cysts, or lumps. Rosacea
may also result in reddened skin, scaling and swelling of affected
areas. Pustules are not pimples. Pimples have a bacterial component
to their makeup and are also mainly localized in and around the
hair follicles.
Although it
may first appear as early as the teen years, rosacea most frequently
begins when sufferers enter their 30s, 40s or 50s as a flushing
or transient redness on the cheeks or nose, and in some cases the
chin or forehead. In this earliest stage, some patients may report
stinging or burning sensations, including the feeling of dry or
tight skin.
The cause of
rosacea is unknown but there are several theories regarding the
origin of overactive facial blood vessels and inflammation. There
may be a genetic component. Hair follicle mites (Demodex folliculorum)
may be involved in at least some cases, as these are found in greater
numbers within rosacea papules. An increased incidence of rosacea
has been reported in those who carry the stomach bacterium, Helicobacter
pylori, but is not known how they may be related.
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