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Thirty percent of people who suffer from psoriasis end up developing psoriatic arthritis, which is an autoimmune condition that causes swelling, pain, as well as stiffness in the joints of the body. This type of arthritis is generally classified into five subtypes. The classification system of Psoriatic Arthritis depends on which joints of the body are affected and how many joints are affected. Psoriatic arthritis can either be mild or severe and can either involve one joint or many joints. Today we take a closer look at how to classify psoriatic arthritis and what it's all about.
