The psoriasis is very frequent, affecting 8 of every 10.000 persons. It can turn out to be sudden or gradually. It can affect at any age, but normally it starts between the 15 and 35 years of age. It is characterized by frequent episodes of recurrence and reference.

The psoriasis is of unknown cause, although it seems to be a hereditary illness, and to be related to the immune answer and the inflammation. The new cells of the normal skin are late approximately 1 month in emigrating from the deepest layers of the skin up to the surface; in the psoriasis, this process only takes a few days, so that there is a constant cells spare, the dead cells cannot flake off slowly and persist forming big scales.

The typical thing there is the appearance of frequent sprouts of eruption in scaly red badges, of predominance on elbows, knees, trunk, hands / fingernails and scalp. The badges it has well definite reddish rims, and they can sting, flake off and crack. Sometimes the injuries are small and multiple (psoriasis in drops).

The psoriasis can accompany herself also of joints inflammation, with predominance in the small joints of hands and feet (arthritis psoriásica).

It usually base in the appearance of the cutaneous injuries.
A biopsy of the skin can be necessary to discard other processes.

It focuses towards the control of the symptoms and the prevention of secondary infections. The light cases talk each other generally at home, with such measurements as:

• Emollient shampoos (to the tar, etc)
• Corticoids in cream and/or capillary lotion.
• Antifungoid topics.
• Moderate solar exhibition.
• Artificial phototherapy, previous sensitization to the skin with a medication called psoralenos.
• Daily baths of oats and maintenance of a good cutaneous hygiene.
• Good health habits: Suitable balanced diet, exercise and rest, and to avoid the stress.

- Secondary infections, which can be spread and become systemic.

- Precocious aging of the skin.

- Leather cancer.

- Cataracts.

- Eritroderma psoriásico: Injuries psoriásicas affecting to most of the corporal surface, with big losses of liquids for the skin and important risk of secondary infections.

The psoriasis is usually a chronicle and can be supported of for life with aggravations and references. In general, it is controlled very well with the treatment.