What is it?
Psoriasis
It is a chronic and benign
skin disorder characterized by erythematous scaly lesions.
Psoriasis is common, both in men than in women. 2%
of the world population suffers from psoriasis. The disease is very rare in people with black skin.
The disease is not serious but its evolution is very long and extensive desperate. It can affect
the quality of life of subjects,
because of significant physical changes in
sometimes. It is absolutely not contagious.
Psoriasis
causes
The cause of the disease remains unknown
despite all the current research.
Family histories of psoriasis are frequent.
Psoriasis symptoms
The onset of the disease is progressive, usually between 10 and 40
years without deterioration of general
state. The elementary
lesion is psoriatic closet, rounded or oval, although limited, consisting of an erythematous base
(redness) overcome many scales in spot candle. The scales
correspond to excess dead cells that
accumulate. Cell renewal is
accelerated in psoriasis effect.
Scraping with a
curette the lesion revealed a thin transparent film that, once torn, discovers
congestive dermis (sign of the bloody dew). Pruritus
(itching) is rare.
In young subjects, the rash sometimes forms a guttate psoriasis, often brutal start,
can recur in the
same mode or turn into classical
form.
The topography of the lesions
is very characteristic, reaching extension
of the legs (knees, elbows), back, buttocks, around the navel and
scalp.
Injuries evolve in spurts, regressing spontaneously and reappearing under the influence of stress or during an
infection.
Indeed, emotional stress, a psycho shock, infection (streptococci), a wound, intense insolation, local medication, treatment with chloroquine,
stopping systemic corticosteroids are
sometimes found in origin of the disease or a relapse.
Particular forms are described:
- Face psoriasis often improved by the sun;
- Palmoplantar psoriasis;
- Psoriasis of the nail;
- Pustular psoriasis;
- Generalized erythrodermic psoriasis with alteration of general condition.
