Scalp Psoriasis Treatment: Avoid These Mistakes for Better Results Psoriasis is a chronic autoimmune condition that causes the rapid growth of skin cells. This leads to patches of thick, red, inflamed skin, often covered with silvery scales. Psoriasis can appear anywhere on the body, including the scalp, elbows, knees, and lower back. Because it is a lifelong condition, the quest for a solution often leads individuals to explore alternative natural treatment for psoriasis, including homeopathy.