What is psoriasis?

Psoriasis, an autoimmune disorder, is a chronic skin condition. It is characterized by inflamed, red, raised areas that often develop into silvery scales on the scalp, elbows, knees, and lower back. Psoriasis can also be associated with arthritis. It is estimated to affect 7.5 million people in the U.S.

What causes psoriasis?

The cause of psoriasis is unknown; however, it is thought to be caused by abnormally fast-growing and shedding skin cells. The skin cells multiply quickly. This causes the skin to shed every 3 to 4 days. This may be caused by a trigger, such as injury, sunburn, certain classes of medicines, infection, stress, alcohol, or tobacco. Though not contagious, the condition is hereditary. Psoriasis often returns and can be more severe one time than another. 

What are the symptoms of psoriasis?



  • Guttate psoriasis. This type of psoriasis affects mostly children. Symptoms may include many small spots of red, raised skin. A sore throat usually proceeds the onset of this type of psoriasis.


The symptoms of psoriasis may look like other skin conditions. Always talk with your healthcare provider for a diagnosis.

How is psoriasis diagnosed?


Treatment for psoriasis


  • Your age, overall health, and medical history

  • Severity of the condition

  • Your tolerance of specific medicines, procedures, or therapies

  • Expectations for the course of the condition

  • Your opinion or preference


  • Ointments and creams (to moisturize the skin)

  • Sunlight or ultraviolet light exposure (under a healthcare provider's supervision)

  • Laser treatments

  • Topical steroid creams

  • Vitamin D cream

  • Creams containing salicylic acid or coal tar


  • Oral or topical retinoids

  • Immunosuppressive medicines (such as cyclosporine or methotrexate)

  • Newer injectable biologic medicines 

