How pressure ulcers develop. Pressure ulcers can develop when a large amount of pressure is applied to an area of skin over a short period of time. They can also occur when less pressure is applied over a longer period of time. The extra pressure disrupts the flow of blood through the skin.

What causes pressure ulcers to develop?

Pressure sores are wounds that develop when constant pressure or friction on one area of the body damages the skin. Constant pressure on an area of skin stops blood flowing normally, so the cells die and the skin breaks down. Other names for pressure sores are bedsores, pressure ulcers and decubitus ulcers.

What causes pressure injury?

Pressure injuries are caused when a force is applied to the skin, causing damage to the tissue. Several types of force include: Pressure: Constant pressure on the skin results from remaining in the same position for a prolonged period of time.