psoriatic arthritis information from trusted sources:
Psoriatic arthritis is a form of arthritis that affects some people who have psoriasis, a serious skin condition. Most people develop psoriasis first and are later diagnosed with psoriatic arthritis, but arthritis can sometimes develop before skin lesions appear.
Psoriatic arthritis is a specific condition in which a person has both psoriasis and arthritis. Psoriasis is a common condition. A person with psoriasis generally has patches of raised red skin with scales. The affected skin looks different depending on the type of psoriasis the individual has. Arthritis is joint inflammation. Psoriatic arthritis is an autoimmune disease, meaning that your cells and antibodies (part of your immune system) fight your own tissues. Rarely, a person can have psoriatic arthritis without having obvious psoriasis. Usually, the more severe the skin symptoms are, the greater the likelihood a person will have psoriatic arthritis. Severe psoriatic arthritis involving the finger joints. Psoriasis affects 2.5% of white people in North America. It is less common in African American and Native American people. Psoriatic arthritis affects 5-8% of people with psoriasis. A recent survey by the National Psoriasis Foundation indicated that approximately 1 million people in the United States have psoriatic arthritis. Many people who have psoriasis may not know that they have psoriatic arthritis. Males and females are equally likely to have psoriasis. For psoriatic arthritis, males are more likely to have the spondylitic form (in which the spine is affected), and females are more likely to have the rheumatoid form (in which many joints may be involved). Psoriatic arthritis usually develops in people aged 35-55 years. However, it can develop in people of almost any age.
Psoriatic arthritis is an arthritis that is often associated with psoriasis of the skin.
Reactive arthritis (also known as Reiter's syndrome) can cause a wide range of symptoms. The most common symptoms include:
Rheumatism: A general term for acute and chronic conditions characterized by inflammation, soreness and stiffness of muscles, and pain in joints and associated structures. It includes arthritis (infectious, rheumatoid, gouty), arthritis due to rheumatic fever or trauma/ degenerative joint disease: neurogenic arthropathy, hydroarthrosis, myositis, bursitis, fibromyositis, and many other conditions. Arthritis: Inflammation of a joint, usually accompanied by pain, swelling and frequently, changes in structure. Other forms of arthritis include ankylosing spondylitis (AS), and the systemic lupus erythematosus (SLE).
Psoriasis is a non-contagious, lifelong skin problem with thickened red and often scaly skin. It is very likely to run in families (hereditary) and seems to be caused by errors in how the immune system works. Certain substances and situations (triggers) may cause psoriasis to flare or worsen. Triggers include injury to the skin, HIV/AIDS infection, certain drugs, emotional stress, smoking, and alcohol consumption. Psoriasis may also be triggered by infection with a type of bacteria called Streptococcus.
Psoriatic arthritis - MayoClinic.com
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