Psoriasis is an immune-mediated skin condition characterized by red, thickened, scaly patches of skin most commonly located on the elbows, knees, scalp, lower back and pelvic area. Treatments include a variety of topical preparations, narrowband UVB phototherapy, and a multitude of different prescription strength systemic treatments. Collectively, our expert panel of board certified dermatologists have treated thousands of cases of psoriasis, and below are their top recommendations for nonprescription psoriasis treatment options.