Question

What are the different levels of psoriasis?

Answer 1

Doctors divide people with psoriasis according to the amount of affected skin:

Mild-to-moderate or limited psoriasis: Less than 3% of total body surface is affected. (For reference, the palm of the hand is about 1% of total body area.)
Moderate psoriasis: 3% to 10% or more of body surface is affected.
Severe psoriasis: greater than 10% is affected.