Only a few patches, less than 3% of the skin surface area.
What Is Plaque Psoriasis?
Plaque psoriasis may seem as if it is only skin deep, but it actually starts below the surface. The plaque thickness, scaling and redness you see are caused, in part by an overactive immune system. Watch this video to learn more about what causes psoriasis from the inside out.
Patients often show symptoms of plaque psoriasis on their knees, elbows, and torso.
Some plaque psoriasis symptoms are worse than others*; according to the National Psoriasis Foundation (NPF), cases can be qualified as:
3% to 10% of the skin surface area.
More than 10% of the skin surface area.