| | Who gets psoriatic arthritis?
About 1 in 10 people with develop psoriatic arthritis. (About 2 in 100 people develop psoriasis at some stage in their life.
Psoriasis most commonly first occurs between the ages of 15 and 25, and psoriatic arthritis most commonly develops between the ages of 25 and 50. However, both psoriasis and psoriatic arthritis can occur at any age, including in childhood.
In most cases, the arthritis develops after the psoriasis - most commonly within 10 years after the psoriasis first develops. However, in some cases the arthritis develops much later. In a small number of cases the arthritis develops first, sometimes months or even years before the psoriasis develops. Men and women are equally affected.
Psoriatic arthritis is different, and is a particular type of arthritis that occurs only in some people with psoriasis.
Note: people with psoriasis also have the same chance as everyone else of developing other types of arthritis such as rheumatoid arthritis and osteoarthritis.