Hidradenitis suppurativa nodule and skin tunnels unroofed

This picture shows the completely unroofed, inflamed hidradenitis suppurativa nodule and multiple skin tunnels. Note the skin edges are beveled, and the base is scraped clean of debris by rough gauze grattage. Hemostasis is controlled using ferric chloride, and the wound is cleansed with hydrogen peroxide and covered with petrolatum dressing.