Plaque psoriasis is the most common type of psoriasis. If you have this type of psoriasis you can expect to see red raised lesions that are covered in silvery scales. The most common areas for plaque psoriasis to appear are on the knees, elbows, lower back and scalp psoriasis. If you think you have this skin condition it is important that you know about  the risk factors and treatments. Find out more about Plaque Psoriasis