A skin and joint disease with multifactorial causes, psoriasis effects 1-2% of the general population. Psoriasis ranges from mild to severe form, also sometimes involves joints. psoriasis patients have a high risk of metabolic disorders like diabetes as well as cardiac complications. Psoriasis can present in children too. Psoriasis is an autoimmune disorder occurring in humans.

It has genetic predisposition

Mechanical, chemical or radiation trauma can initiate or worsen psoriasis.

Most patients are young or middle age adults although, no age is exempt. Males are affected a little more frequently than females. They present as a thick silvery scales and after scratching them leaves pinpoint bleeding. The areas normally involved are extremities, knees, elbows, lower back, and scalp.

Types of psoriasis

Scalp psoriasis – Thick scales are found on the scalp which extends the hairline.

Palmoplantar psoriasis – Symmetric reddish patches covered with thick and large scales affecting palms and soles is the typical presentation. If untreated painful fissures can supervene and affect day to day activities.

Nail psoriasis – Nails are involved secondary to nail bed and nail matrix. Numerous pits in the nail plate are the commonest manifestation.

Guttate psoriasis – The variant is common in children and has the best prognosis, guttate drops like lesions with white scale appear all over the body, especially the trunk. Lesions resolve within one or two months.

Erythrodermic psoriasis – widespread scaling and redness are present, it is one of the most severe forms and requires hospitalization.

Inverse psoriasis – erythematous well-defined plaques over axillae and groins without prominent scaling.

Psoriatic arthritis – about 15% of psoriatics develop arthritis sometime during their life. Psoriatic arthritis affects the distal interphalangeal joints or mimics rheumatoid arthritis.

Patients are depressed and withdraw from social activities.alcohol abuse, obesity, diabetes and ischaemic heart disease are commoner than the general population.


Topical therapies are used.