Is risk for skin infections higher in people with psoriasis than in people with normal skin?

Studies have shown that psoriatic plaques and adjacent normal skin usually have the same type of bacteria, but the number of bacteria per square millimeter is higher in the psoriatic plaques. This, in itself, is usually not an increased risk for secondary infections.Risk for secondary infections may increase with hard scratching as this abrades the skin and opens it to bacterial invasion. Hard scratching should be avoided for this reason, and because abrasion of the skin can trigger formation of new psoriatic lesions.A skin hygiene program recommended by a dermatologist is usually adequate to keep bacterial populations in check. Specific anti-bacterial measures may be prescribed by a dermatologist when such measures are warranted.Symptoms of secondary infection are redness of skin around a psoriatic lesion or increased redness of the lesion, increased warmth in the skin and/or pus in the skin in the area of a lesion. Fever, malaise, and light-headedness can be symptoms of a serious systemic infection.