Surgery
Limited evidence suggests removal of the tonsils may benefit people with chronic plaque psoriasis, guttate psoriasis, and palmoplantar pustulosis. Diet
Uncontrolled studies have suggested that individuals with psoriasis or psoriatic arthritis may benefit from a diet supplemented with fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). A low-calorie diet appears to reduce the severity of psoriasis. Diet recommendations include consumption of cold water fish (preferably wild fish, not farmed) such as salmon, herring, and mackerel; extra virgin olive oil; legumes; vegetables; fruits; and whole grains; and avoid consumption of alcohol, red meat, and dairy products (due to their saturated fat). The effect of consumption of caffeine (including coffee, black tea, mate, and dark chocolate) remains to be determined.Many patients report improvements after consuming less tobacco, caffeine, sugar, nightshades (tomatoes, eggplant, peppers, paprika and white potatoes) and taking probiotics and oral Vitamin D.There is a higher rate of celiac disease among people with psoriasis. When adopting a gluten-free diet, disease severity generally decreases in people with celiac disease and those with anti-gliadin antibodies. Prognosis
Most people with psoriasis experience nothing more than mild skin lesions that can be treated effectively with topical therapies.Psoriasis is known to hurt the quality of life of both the affected person and the individuals family members. Depending on the severity and location of outbreaks, individuals may experience significant physical discomfort and some disability. Itching and pain can interfere with basic functions, such as self-care and sleep.
Each form has a dedicated ICD-10 code. Psoriasis can also be classified into nonpustular and pustular types. Pathogenetic
Another classification scheme considers genetic and demographic factors. Type 1 has a positive family history, starts before the age of 40, and is associated with the human leukocyte antigen, HLA-Cw6. Conversely, type 2 does not show a family history, presents after age 40, and is not associated with HLA-Cw6. Type 1 accounts for about 75% of persons with psoriasis.The classification of psoriasis as an autoimmune disease has sparked considerable debate. Researchers have proposed differing descriptions of psoriasis and psoriatic arthritis; some authors have classified them as autoimmune diseases while others have classified them as distinct from autoimmune diseases and referred to them as immune-mediated inflammatory diseases. Severity
No consensus exists about how to classify the severity of psoriasis. Mild psoriasis has been defined as a percentage of body surface area (BSA)≤10, a Psoriasis Area and Severity Index (PASI) score ≤10, and a Dermatology Life Quality Index (DLQI)  score ≤10. Moderate to severe psoriasis was defined by the same group as BSA >10 or PASI score >10 and a DLQI score >10.The DLQI is a 10-question tool used to measure the impact of several dermatologic diseases on daily functioning. The DLQI score ranges from 0 (minimal impairment) to 30 (maximal impairment) and is calculated with each answer being assigned 0–3 points with higher scores indicating greater social or occupational impairment.The PASI is the most widely used measurement tool for psoriasis.