Psoriasis is a chronic skin condition. It appears as red or purplish patches with silvery scales that are dry and itchy. These lesions can occur on and off in a person’s lifetime. In a patient with psoriasis skin cells are formed at a faster rate than the rate they are shed. These skin cells will build up and accumulate as thick scales or plaques on the surface of the skin.
Words - Dr. Sharmila Samaranayake
Genetic predisposition can associate with psoriasis. Therefore, it can run in families but not always. There is a defect in the immune system which may be a cause. Certain trigger factors such as; stress, infections, smoking and sun burn can give rise to or exacerbate psoriasis. There are various types of psoriasis. Plaque psoriasis is the commonest type.