What Causes Psoriasis?

Infections

Many types of infections can trigger the onset of psoriasis when combined with an individual's other predisposing factors. Infections caused by streptococcal bacteria can trigger the onset of guttate psoriasis. Guttate psoriasis can be triggered by other types of infections as well. This type of psoriasis is known to occur suddenly, and produce raised, scaly, small, round spots on an affected individual's skin referred to as papules. These papules most often occur on a patient's torso, arms, legs, face, scalp, and ears. Streptococcal infections and infections that occur in an individual's upper respiratory tract have also been known to trigger flare-ups of guttate psoriasis. Tonsillitis infections caused by viruses or bacteria have also been known to trigger guttate psoriatic episodes. The first symptoms of an infection that later causes a guttate psoriasis flare-up will usually manifest between two and three weeks before the psoriatic lesions develop.

Read more about the various triggers associated with psoriasis now.