Psoriasis is a persistent inflammatory skin condition. Psoriasis is different than other skin conditions because without treatment it tends to worsen over time.
The cause of psoriasis has recently been found to be a genetic overworking of the immune system. Psoriasis is most common in the scalp, elbow, torso, and knee areas.
Over a quarter of individuals with psoriasis will also develop psoriatic arthritis. Psoriatic arthritis causes pain, swelling, and stiffness in the joints. The most common joints affected by psoriatic arthritis are the fingers, toes, knees, and ankles.
Dermatologists may use topical ointments, systemic medications, or light therapy to treat psoriasis.