Psoriasis is an autoimmune disease that causes raised, red, scaly patches to appear on the skin, usually on the elbows, knees, or scalp. As much as 10 percent of the population have the genes that could lead to psoriasis; however, only 2 to 3 percent actually develops the disease.

While the exact cause of psoriasis is unknown, the immune system and genetics play a large role in its development. Those with the disease typically first see signs between the ages of 15 and 35, but it can develop at any age. Psoriasis can be painful physically and mentally for those with the disease; however, it is not contagious.

There are many different reasons why someone's psoriasis becomes active, including:

• Stress
• Injury to the skin
• Certain medications including lithium, antimalarials, Inderal, quinidine, and
• indomethacin
• Infections that weaken the immune system, such as strep throat

If you develop a rash that does not go away with an over-the-counter medication, you should see your doctor or a dermatologist to determine if it is psoriasis. Your doctor will work with you on treatment options, which may reduce symptoms. Treatments that work for someone else may not work for you, so it’s important to work closely with your doctor.

For more information and resources on psoriasis, visit psoriasis.org.