The latter is characterized by the appearance of scales and plaques that appear on various parts of the body, the scalp, elbows and knees are the most affected areas. Unsightly, these plates and scales can cause many problems.
Psoriasis constitutes flares during which plaques appear or are exacerbated, and remission during which they sometimes regress and even disappear. These outbreaks can last from several weeks to several months.
Psoriasis usually affects only the skin, sometimes even causes pain on the affected area. In rare cases, the disease can worsen and affect the entire skin (psoriatic erythroderma). The joints may also be affected (psoriatic arthritis) in 1 out of 10 cases. Therefore the impact is more severe.
While complications are infrequent and psoriasis generally do not decreases life expectancy, quality of life is often degraded due to how others perceive these disease.
No one knows the cause, psoriasis patients suffer more from cardiovascular disorders, obesity and metabolic syndrome than the general population.