Mayo Clinic

Treatment for psoriasis usually starts with a mild approach

DEAR MAYO CLINIC: Is there any way to know what causes psoriasis? What's the best way to treat it?

ANSWER: Psoriasis has a tendency to run in families, and exacerbations often are linked to the body's immune system responding to certain internal or external factors. The exact cause of psoriasis is not easy to determine. Treatment depends on how severe the psoriasis is and how responsive it has been to previous treatment. Treatment usually starts with mild approaches and proceeds to stronger remedies but only as they are needed.

Psoriasis is a skin disease that affects the life cycle of skin cells. Normal skin grows and sheds every 28 days, or about once a month. Psoriasis skin...