The document discusses pressure ulcers, including defining them as lesions caused by unrelieved pressure that damage underlying tissue. It describes the pathology of pressure ulcers as resulting from pressure, blood vessel collapse, and tissue necrosis. It also lists factors that affect development of pressure ulcers such as aging, immobility, nutrition, hydration, moisture, warmth, poor hygiene, and incontinence. The document provides steps for preventing pressure ulcers, which include identifying at-risk patients, assessing skin daily, keeping skin clean and dry, avoiding massage over bony areas, minimizing friction, improving nutrition and mobility, and documenting prevention measures used.