Dermatology Made Simple : Psoriasis : Clinical Lesions and Trigger Factors

Clinical Lesions in Psoriasis:

Usually, a patient with psoriasis will have the following clinical lesions:

1.Plaques:

These are well defined raised lesions.

They may be variable ie large or small,few or extensive,over arms legs or trunk.

2.Scaling:

This is a chatacteristic feature of Psoraisis.

There are silver plaques on the plaques.

3.Redness/Erythema:

The affected skin will be markedly erythematous/red.

This may be more marked in body flexures such as groin and axillae (Arm pits).

4.Pustules:

Pustules may occasionally be seen in Psoriasis.

Factors Affecting Psoriasis:

1.Age:

Most commonly,first presentation is around 27 years,however the age of onset is variable and can affect at any age from infancy to old age

2.Familiy History:

There is an increased incidence of Psoriasis in offspring of affected parent.

3.Infections:

Infection of any type can trigger the onset of psoriasis.

4.Stress:

It has been noted that any type of stress can also enhance or trigger psoriaisis in predisposed individuals.

5.Trauma:

In predisposed individuals,lesions may develop at sites of trauma on the skin.In this case term used is 

Koebner”s phenomenon.

1.Pustular Psoriasis

2.Nail Psoriasis





3.Plaque Psoriasis





4.Guttate Psoriaisis





5.Scalp Psoriasis

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