What is Psoriasis? Psoriasis is an immune-mediated disease that causes raised, red, scaly patches to appear on the skin. Psoriasis typically affects the outside of the elbows, knees or scalp, though it can appear on any location. Some people report that psoriasis is itchy, burns and stings. Psoriasis is associated with other serious health conditions, such as diabetes, heart disease and depression.If you develop a rash that doesn't go away with an over-the-counter medication, you should consider contacting Vedam Ayurveda.Psoriasis treament at Vedam Ayurveda BTM, BangaloreKnow moreSymptoms The symptoms of psoriasis vary depending on the type you have. Some common symptoms for plaque psoriasis -- the most common variety of the condition -- include: Plaques of red skin, often covered with silver-colored scales. These plaques may be itchy and painful, and they sometimes crack and bleed. In severe cases, the plaques will grow and merge, covering large areas.Disorders of the fingernails and toenails, including discoloration and pitting of the nails. The nails may also crumble or detach from the nail bed.Plaques of scales or crust on the scalp.People with psoriasis can also get a type of arthritis called psoriatic arthritis. It causes pain and swelling in the joints. The National Psoriasis Foundation estimates that between 10% to 30% of people with psoriasis also have psoriatic arthritis.