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Guttate Psoriasis (cont.)

What Causes Guttate Psoriasis?

An outbreak of guttate psoriasis is thought to be triggered by a previous streptococcal infection or some other type of infection. The precise mechanism whereby streptococcal infections induce psoriasis awaits more research.

Since psoriasis may be inherited, those with a family history of psoriasis have an increased chance of developing the guttate form of the disease. Some people carry genes that make them more likely to develop psoriasis. The precise manner in which these genes interact with molecules produced by streptococcal bacteria or other microorganisms resulting in guttate psoriasis is currently not fully understood.

Factors that may trigger guttate psoriasis include the following:

  • Streptococcal infection: As many as 80% of people with guttate psoriasis have a streptococcal infection, usually in the form of tonsillopharyngitis, before the outbreak. Even though the connection between these infections and the outbreaks has been known for over 50 years, the exact mechanism by which the infection triggers the lesions is unknown.
  • Viral infections, such as chickenpox, rubella, and roseola, may also trigger outbreaks in children.
Medically Reviewed by a Doctor on 3/2/2016

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Read What Your Physician is Reading on Medscape

Psoriasis, Guttate »

Guttate psoriasis refers to a distinctive, acute clinical presentation of an eruption characterized by small, droplike, 1-10 mm in diameter, salmon-pink papules, usually with a fine scale

Read More on Medscape Reference »


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