According to the National Psoriasis Foundation, psoriasis is the most prevalent autoimmune disease in the United States. It can develop at any age, but usually occurs in people between 15 and 25 years old. The main symptoms include itchy, red patches of thick skin with silvery scales on the elbows, knees, scalp, back, face, palms, and feet.
Psoriasis can be irritating, stressful, and embarrassing. Creams, ointments, medications, and light therapy may help. However, some research suggests diet may help. Click through the slideshow to find out which foods to avoid.