Based on the skin condition, pruritus ani was classified by Gordon into three conditions as follows:
Stage 0: There is a normal appearance of skin in this stage.
Stage 1: The skin appears red and inflamed.
Stage 2: In this stage, there is the presence of white lichenified skin.
Stage 3: In this stage, there is lichenified skin, along with coarse ridges of skin, and ulcerations often occur secondary to scratching.