Psoriasis is a chronic skin disease where the skin cells form a mass of scales. These patches of skin are dry, red and itchy. It is an autoimmune disease which usually occurs on the skin of the back, scalp, palms, knees, elbows and around the fingernails and toenails, but some people have the diseased patches of skin all over the body. The patches may also crack, flake and bleed. The condition has no definite cure but the symptoms can be treated and managed.
Causes of Psoriasis
The following factors are proven to have contributed to cases of psoriasis:
More than 32% of the cases of psoriasis have been linked to genes. In case of identical twins, if one twin has the disease, the other has a 70% chance of getting it too. There are several genes associated with the disease and most of these genes are related to the immune system. T cells (lymphocytes which affect cell specific immunity) can also cause psoriasis.
Human Immuno-deficiency Virus adversely affects the immune system and increases susceptibility of all kinds of infections and diseases. HIV-positive individuals have been found to have an increased risk of psoriasis than HIV-negative people.
3. Other diseases
Anti-malarial, anti-inflammatory and blood pressure medicines can cause psoriasis as a side effect. The disease is also an effect of withdrawal from topical steroid creams and other steroid-based medication.
Symptoms of Psoriasis
The symptoms of psoriasis may vary from patient to patient. However, if more than two of the following signs are seen, it is likely that psoriasis is the causative condition:
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