Skin Health Psoriasis Gallery of Photos of Psoriasis Signs and Symptoms You Should Know About By Heather L. Brannon, MD Heather L. Brannon, MD, is a family practice physician in Mauldin, South Carolina. She has been in practice for over 20 years. Learn about our editorial process Heather L. Brannon, MD Medically reviewed by Medically reviewed by Casey Gallagher, MD on May 15, 2020 Casey Gallagher, MD, is board-certified in dermatology and works as a practicing dermatologist and clinical professor. Learn about our Medical Review Board Casey Gallagher, MD Updated on August 19, 2020 Print Psoriasis is a skin condition that is mainly diagnosed based on its appearance. Plaques can be characterized as dry, red skin patches covered with silvery-white scales that most commonly appear on the forearms, shins, and scalp. But since psoriasis can mimic other conditions, it can be helpful to view photos of psoriasis cases to see how your skin issues compare. Of course, doing so can't help you officially rule out psoriasis or confirm such a diagnosis, but it can at least give you a sense of the ways it may present. There are actually several different types of psoriasis, and the following photos depict the two most common ones—plaque psoriasis and guttate psoriasis. Other forms include inverse psoriasis, which develops in skin folds, and pustular psoriasis, which manifests with pus-filled lesions. Psoriasis is an inflammatory autoimmune disease affecting around 3% of the world's population and no less than 2.2% of the United States population, according to a 2018 review in Dermatology Research and Practice. Plaque Psoriasis This photo contains content that some people may find graphic or disturbing. See Photo DermNet / CC BY-NC-ND Plaque psoriasis is the most common form of the disease, accounting for 80% to 85% of all cases. The name references the classic skin lesions that define the disease. Round to oval in shape with clearly defined borders, the plaques most often appear on extensor surfaces. These are areas of skins on the outer side of a joint (as opposed to flexor surfaces on the inner side of a joint where the skin creases). Examples include the back of the forearm near the elbow (as pictured) and the front of the knee. Plaque psoriasis can also develop on the scalp, neck, ears, and just above the buttocks adjacent to the lumbar spine. The plaques tend to be more than half a centimeter (0.2 inches) in diameter and have very thick scales. Topical treatments can help clear plaques by tempering local inflammation and gently loosening the scales. Symptoms of Plaque Psoriasis Plaque Psoriasis of the Elbow This photo contains content that some people may find graphic or disturbing. See Photo Psoriasis. CDC/Susan Lindsley This photo illustrates how thick plaques can become if left untreated. Beyond a lack of appropriate treatment, plaque psoriasis can be instigated by any number of common and uncommon triggers. These include stress, infections, obesity, alcohol, smoking, skin trauma, medications, extreme humidity, and cold/dry weather. Many of these—drugs and stress, especially—can exacerbate flares, making symptoms worse and more difficult to control. In cases this severe, a doctor would likely recommend immunosuppressant drugs that temper the overactive immune response. These include disease-modifying antirheumatic drugs (DMARDs) like methotrexate and cyclosporine, or new biologic drugs like Humira (adalimumab) and Enbrel (etanercept). How Plaque Psoriasis Is Treated Plaque Psoriasis of the Gluteal Cleft This photo contains content that some people may find graphic or disturbing. See Photo Plaque Psoriasis. CDC/Dr. Gavin Hart The gluteal cleft (the crease of skin between the buttocks) is a common site for plaque psoriasis. This photo illustrates the characteristic plaques with their clearly defined borders and patchy scales. The scales are one of the clues that differentiate plaque psoriasis from inverse psoriasis, which can also develop in the gluteal crease. However, with inverse psoriasis, the lesions tend to be smooth with few visible scales. Inverse psoriasis is more common in people with obesity who have more skin folds and greater amounts of adipose (fat-storing) tissues. The problem with gluteal involvement is that the very act of sitting can irritate inflamed skin and make the condition worse. Psoriasis Treatments by Body Part Multiple Psoriatic Plaques This photo contains content that some people may find graphic or disturbing. See Photo Plaque Psoriasis Appears on the Elbow and Arm. CDC/Dr. N.J. Fiumara In this photo, plaque psoriasis appears on the elbow and arm. There is little scaling, but the affected skin appears thick, red, and irritated. At first glance, it is easy to mistake the multiple lesions for any number of other skin conditions. Because there are no blood tests or imaging studies that can definitively diagnose psoriasis, misdiagnosis can sometimes occur. The diagnosis of psoriasis is based primarily on the appearance of the lesions, a review of one's medical history (including a family history of psoriasis), and the exclusion of all other causes (referred to as the differential diagnosis). Some of the diseases and conditions that look similar to psoriasis include: Tinea curis (jock Itch)Tinea pedis (athlete's foot)Tinea capitisSeborrheic dermatitisEczemaPityriasis roseaRingwormErythrasmaLichen planusLupusSquamous cell carcinoma How Plaque Psoriasis Is Diagnosed Plaque Psoriasis of the Trunk This photo contains content that some people may find graphic or disturbing. See Photo Plaque Psoriasis. CDC/Susan Lindsley It is not uncommon to have psoriatic plaques in areas where clothes are tight, causing friction to the skin. This picture is one such example in which pressure from a belt can give rise to a ring of psoriasis around the waist. The phenomenon, known as the Koebner response, is associated with psoriasis and other diseases in which a rash or lesions will develop along the line of trauma. With psoriasis, a flare may occur as a result of a cut, abrasion, sunburn, rash, or even vigorous scratching. It is even possible for psoriasis to develop on old scar tissues, including tattoos and surgical scars. In this photo, the plaques have begun to heal. Once this is complete, the skin will often look lighter or darker than the surrounding skin. In most cases, the discoloration will normalize over time. Guttate Psoriasis This photo contains content that some people may find graphic or disturbing. See Photo Guttate Psoriasis of the Trunk. Wikimedia Commons/Bobjgalindo Guttate psoriasis is the second most common form of psoriasis, accounting or around 10% of cases, according to the National Psoriasis Foundation (NPF). The name is derived from the Latin word gutta, which means droplet. It is characterized by small, teardrop-shaped lesions that most often develop on the trunk, but can also appear on the arms, legs, and scalp. Guttate psoriasis is often triggered by a bacterial or viral infection. This is especially true with streptococcal infections like strep throat and viral infections like chickenpox and measles. Because these diseases are more common in childhood, children tend to be affected by this type of psoriasis more often than adults. Adults under 30 are also vulnerable. 6 Common Triggers of Psoriasis Mild Guttate Psoriasis This photo contains content that some people may find graphic or disturbing. See Photo Psoriasis on Torso and Legs. CDC/Susan Lindsley This picture illustrates a mild form of guttate psoriasis. The onset of symptoms is often rapid with multiple lesions erupting on the trunk and extremities in a centripetal pattern (moving from the outside in). Itchiness is common. In addition to infections, certain drugs can trigger a flare. Among the usual suspects are beta-blockers, antimalarial drugs (like Plaquenil), and nonsteroidal anti-inflammatory drugs (especially naproxen). 9 Drugs That Can Trigger Psoriasis Severe Guttate Psoriasis This photo contains content that some people may find graphic or disturbing. See Photo A Severe Case of Guttate Psoriasis. CDC/Dr. Gavin Hart This photo depicts a severe case of guttate psoriasis. As distressing as this may seem, an outbreak is usually self-limiting and will resolve on its own without treatment after several weeks or months. Some people may never experience another episode; others may develop chronic plaque psoriasis that follows them into later adulthood. Because there are no tests to definitively diagnose guttate psoriasis, severe cases like this will typically require a battery of tests to exclude other causes (such as cutaneous T-cell carcinoma or syphilis) and to check for likely triggers (most commonly strep throat or chronic tonsillitis). Psoriasis Doctor Discussion Guide Get our printable guide for your next doctor's appointment to help you ask the right questions. Download PDF Email the Guide Send to yourself or a loved one. Sign Up This Doctor Discussion Guide has been sent to {{form.email}}. There was an error. Please try again. Was this page helpful? Thanks for your feedback! Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Di Meglio P, Villanova F, Nestle FO. Psoriasis. Cold Spring Harb Perspect Med. 2014;4(8):a015354. Published 2014 Aug 1. doi:10.1101/cshperspect.a015354 Kim WB, Jerome D, Yeung J. Diagnosis and management of psoriasis. Can Fam Physician. 2017;63(4):278–285. Rendon A, Schäkel K. Psoriasis Pathogenesis and Treatment. Int J Mol Sci. 2019;20(6):1475. Published 2019 Mar 23. doi:10.3390/ijms20061475 Additional Reading Affandi A, Khan I, Saaya N. Epidemiology and Clinical Features of Adult Patients with Psoriasis in Malaysia: 10-Year Review from the Malaysian Psoriasis Registry (2007–2016). Dermatol Res Prac. 2018; 2018:article ID 4371471. doi:10.1155/2018/4371471 Brandon A, Mufti A, Sibbald G, et al. Diagnosis and Management of Cutaneous Psoriasis: A Review. Adv Skin Wound Care. 2019 Feb;32(2):58-69. doi:10.1097/01.ASW.0000550592.08674.43 National Psoriasis Foundation. Guttate Psoriasis. Portland, Oregon.