Psoriasis is not a common skin disorder. Scientists, up to this day, gather information on related psoriasis causes. Though the faulty signal of the immune system and the patient’s genes are two primary factors on the occurrence of psoriasis, matters involving these factors are still being studied. Psoriasis is characterized by scaly patches, flakes, itchiness and pain. The disorder generally affects all areas of the body, but the prominence of psoriasis is seen on the knees, elbows, hands, feet, back, stomach and scalp. Not all psoriasis is the same—some attacks are mild while some are severe. But to all people with psoriasis, the battle against the psychological and emotional impact of the skin disorder is the most challenging part of having this skin disorder.