Date and age range defining. Generation X is the demographic cohort following the postâWorld War II baby boom, representing a generational change from the baby boomers, but there is debate over what this means because the end date of the baby boomer generation is disputed.
Causes. Psoriatic arthritis occurs when your body's immune system begins to attack healthy cells and tissue. The abnormal immune response causes inflammation in your joints as well as overproduction of skin cells.any people with psoriatic arthritis have a family history of either psoriasis or psoriatic arthritis. Researchers have discovered certain genetic markers that appear to be associated with psoriatic arthritis.
Certain factors may trigger psoriasis in a person who has never had symptoms before. And for those who have psoriasis, these same factors can trigger another bout with the disease. Triggers include: 1  bacterial or viral infections, such as strep throat or the common cold. 2  diseases that weaken your immune system, such as AIDS or cancer. 3  emotional stress. 4  dry air or dry skin (particularly from changes in weather). 5  some medicines, such as beta-blockers, lithium, and anti-malaria drugs.