Which type of ulcer is characterized by pressure on the skin?

The type of ulcer characterized by pressure on the skin is a decubitus ulcer, also commonly referred to as a pressure ulcer or bedsore. These ulcers develop when sustained pressure on the skin impairs blood flow, leading to tissue damage and ulceration. They typically occur over bony areas of the body, such as the heels, sacrum, and elbows, particularly in individuals who are immobile or have limited mobility.

Decubitus ulcers are a significant concern in healthcare settings, especially among patients who are bedridden or use wheelchairs, as the lack of movement can result in prolonged pressure in one area of the skin. The severity of these ulcers can range from mild skin reddening to deep tissue injury that affects muscles and bones. Understanding the causes and characteristics of decubitus ulcers is crucial for effective prevention and treatment in clinical practice.

The other types of lesions listed do not relate to pressure-induced skin damage. Blisters form due to friction, burns, or other irritations of the skin. Pustules are small, inflamed, pus-filled lesions typically associated with acne or infections. Nodules are solid, raised areas found in various skin conditions and are not caused by pressure. Thus, the defining characteristic of a decubitus ulcer