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How can you get psoriatic arthritis from psoriasis?

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A little less than a third of people who have psoriasis will get psoriatic arthritis. Doctors can't yet tell who before it happens, though. Usually, you'll have the skin symptoms first. But sometimes, arthritis symptoms appear months, or even years, before skin problems do. That makes it hard to diagnose. People with severe psoriasis could have a greater chance of getting psoriatic arthritis. About 40% of people who get psoriatic arthritis have relatives with it or with psoriasis. Scientists don't know which genes are responsible for these conditions. Figuring that out will help doctors predict who is likely to get these conditions. It may lead to new treatments, too.

SOURCES:

American College of Rheumatology: "Psoriatic arthritis."

National Psoriasis Foundation: "Psoriatic arthritis."

Philip Mease, MD, Seattle Rheumatology Associates.

John Hardin, MD, chief scientific officer, Arthritis Foundation; professor of medicine, Albert Einstein College of Medicine, New York City.

Arthritis Foundation: "Psoriatic arthritis."

Mark Lebwohl, MD, professor and chairman of dermatology, Mount Sinai School of Medicine.

The Johns Hopkins Arthritis Center: "Psoriatic arthritis," "New Onset Psoriatic Arthritis Reported in Psoriasis Patients Treated with Efalizumab."

Viguier, M.   , May 2008. Arthritis Rheum

Reviewed by David Zelman on May 5, 2017

SOURCES:

American College of Rheumatology: "Psoriatic arthritis."

National Psoriasis Foundation: "Psoriatic arthritis."

Philip Mease, MD, Seattle Rheumatology Associates.

John Hardin, MD, chief scientific officer, Arthritis Foundation; professor of medicine, Albert Einstein College of Medicine, New York City.

Arthritis Foundation: "Psoriatic arthritis."

Mark Lebwohl, MD, professor and chairman of dermatology, Mount Sinai School of Medicine.

The Johns Hopkins Arthritis Center: "Psoriatic arthritis," "New Onset Psoriatic Arthritis Reported in Psoriasis Patients Treated with Efalizumab."

Viguier, M.   , May 2008. Arthritis Rheum

Reviewed by David Zelman on May 5, 2017

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How are psoriasis and psoriatic arthritis different?

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