A **hydrocolloid roll** is a flexible, self-adhesive medical dressing designed to facilitate moist wound healing for minor injuries like blisters, abrasions, and light-exudate wounds. It consists of a gel-forming agent—typically pectin, gelatin, or carboxymethylcellulose—bonded to a waterproof, semi-occlusive backing. When the dressing comes into contact with wound moisture, it creates a protective gel layer that cushions the area from friction and keeps it hydrated. Because it is sold in a continuous roll, it offers a customizable and cost-effective solution, allowing users to cut the exact length needed for awkwardly placed or elongated skin irritations.