The scales can be scraped off, resulting in pinpoint bleeding of the lesions. This variant typically follows a strep infection, such as strep throat. Pustular psoriasis is a distinct variant that occurs as an eruption of small pustules, or pimples, all over the body. This may be accompanied by fever. The pustules can also appear on the palms, soles, and in the nail beds.
Psoriasis usually precedes the onset of arthritis by several years.
The course of psoriasis generally is prolonged and chronic, with unpredictable flare-ups. Some patients experience spontaneous improvement and resolution. To confirm the diagnosis, a skin biopsy can be obtained and sent for pathological analysis. The distinct features of psoriasis under the microscope usually confirm or exclude the diagnosis. Find a dermatologist near you.