Psoriasis is a long-lasting autoimmune disease characterized by patches of abnormal skin.[6] These skin patches are typically reddryitchy, and scaly.[3] On people with darker skin the patches may be purple in colour.[9] Psoriasis varies in severity from small, localized patches to complete body coverage.[3] Injury to the skin can trigger psoriatic skin changes at that spot, which is known as the Koebner phenomenon.[10]

There are five main types of psoriasis: plaque, guttateinversepustular, and erythrodermic.[6] Plaque psoriasis, also known as psoriasis vulgaris, makes up about 90 percent of cases.[4] It typically presents as red patches with white scales on top.[4] Areas of the body most commonly affected are the back of the forearms, shins, navel area, and scalp.[4] Guttate psoriasis has drop-shaped lesions.[6] Pustular psoriasis presents as small non-infectious pus-filled blisters.[11] Inverse psoriasis forms red patches in skin folds.[6] Erythrodermic psoriasis occurs when the rash becomes very widespread, and can develop from any of the other types.[4]Fingernails and toenails are affected in most people with psoriasis at some point in time.[4] This may include pits in the nails or changes in nail color.[4]

Psoriasis is generally thought to be a genetic disease that is triggered by environmental factors.[3] In twin studiesidentical twins are three times more likely to be affected compared to non-identical twins. This suggests that genetic factors predispose to psoriasis.[4] Symptoms often worsen during winter and with certain medications, such as beta blockers or NSAIDs.[4] Infections and psychological stress can also play a role.[3][6]Psoriasis is not contagious.[4] The underlying mechanism involves the immune system reacting to skin cells.[4] Diagnosis is typically based on the signs and symptoms.[4]

There is no cure for psoriasis; however, various treatments can help control the symptoms.[4] These treatments include steroid creamsvitamin D3 cream, ultraviolet light and immune system suppressing medications, such as methotrexate.[6] About 75 percent of cases can be managed with creams alone.[4] The disease affects two to four percent of the population.[8] Men and women are affected with equal frequency.[6] The disease may begin at any age, but typically starts in adulthood.[5] Psoriasis is associated with an increased risk of psoriatic arthritislymphomascardiovascular diseaseCrohn’s disease and depression.[4] Psoriatic arthritis affects up to 30 percent of individuals with psoriasis.[11]


Applewood is a census-designated place (CDP) in Jefferson CountyColoradoUnited States. The population was 7,160 at the 2010 census.[2]

As of the census[4] of 2000, there were 7,123 people, 2,954 households, and 2,055 families residing in the CDP. The population density was 1,473.6 people per square mile (569.4/km²). There were 3,067 housing units at an average density of 634.5 per square mile (245.2/km²). The racial makeup of the CDP was 94.59% White, 0.38% African American, 0.51% Native American, 1.22% Asian, 0.11% Pacific Islander, 1.47% from other races, and 1.71% from two or more races. Hispanic or Latino of any race were 4.38% of the population.

There were 2,954 households out of which 26.7% had children under the age of 18 living with them, 58.9% were married couples living together, 7.3% had a female householder with no husband present, and 30.4% were non-families. 25.2% of all households were made up of individuals and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.87.