hydrocoloids?

Question

how do they work in healing ulcers and pressure sores

Answer 1

Hydrocolloids are occlusive and adhesive wafer dressings which combine absorbent colloidal materials with adhesive elastomers to manage light to moderate amounts of wound exudate.
Most hydrocolloids react with wound exudate to form a gel-like covering which protects the wound bed and maintains a moist wound environment.
Hydrocolloid powders and pastes are also available with increased absorptive capacity

Answer 2

it`s a substance that forms a gel with water, the body`s mostly water !?!