This pressure interferes with blood flow and causes the skin to break down and form an ulcer. Any diseases or problems that lead to immobility can result in pressure sores. It is a common secondary problem in elderly persons. Pressure points naturally occur over bony prominences or in areas where the bone is just beneath the skin, uncushioned by surrounding muscles and fat.
Skin is also more susceptible to breakdown if it becomes wet and irritated.
Tugging, pulling or friction caused by clothes, bedding or skin rubbing against skin may cause the skin to break down. Common sites are over the pelvic area, the back, the outside of the hips, the heels, the bones on each side of the ankle, the elbows, and the back of the head. It is critical for you to aggressively seek help at the first sign of a bedsore to prevent serious, painful injuries to the person in your care. As the condition progresses the skin breaks down and an ulcer develops. If not treated the ulcer can penetrate more deeply into the tissue.