Some people who live with the skin condition psoriasis also develop a form of arthritis known as psoriatic arthritis. It causes inflammation in and around the joints.
Psoriatic arthritis can affect most joints, but typically causes problems in fingers and toes, with pitting and discoloration of nails. About a third of people with psoriatic arthritis also have spondylitis – a stiff, painful back or neck caused by inflammation in the spine.
You can find out more about the condition in our Psoriatic Arthritis information booklet.