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What Causes Psoriasis?
A variety of factors -- ranging from emotional stress and trauma to dry skin and streptococcal infection -- can cause an episode of psoriasis. Recent research indicates that some abnormality in the immune system likely plays a role. As many as 80% of people having flare-ups report a recent emotional trauma, such as a new job or the death of a loved one. Many doctors believe such external stressors serve as triggers for an inherited defect in skin-cell production.
Injured skin and certain drugs can aggravate psoriasis, including the painkiller ibuprofen and the anti-malarial medication chloroquine.
Psoriasis tends to run in families. Fair-skinned adults are particularly susceptible, especially those who have a blood relative suffering from the disorder. Psoriasis is rare among people with dark skin.
Although psoriasis may be stressful and embarrassing, most outbreaks are relatively harmless. With appropriate treatment, symptoms generally subside within weeks.
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