Which layer of the skin is primarily affected by pressure ulcers?

When considering which layer of the skin is primarily affected by pressure ulcers, the correct answer highlights the epidermis. Pressure ulcers, also known as pressure injuries or bedsores, often begin at the skin's surface, where external forces exert pressure against bony prominences.

The epidermis is the outermost layer of the skin and is where the initial stages of skin breakdown occur. Damage to this layer often presents as redness or discoloration, indicating that the skin is being compromised due to prolonged pressure. If the pressure is not relieved, the injury can progress deeper into the dermis and beyond, leading to more severe ulcerations and tissue loss.

While other layers like the dermis, hypodermis, and subcutaneous tissue are involved in deeper stages of pressure ulcer progression, the initial and primary site of injury is the epidermis. Understanding this helps in preventing the advancement of pressure injuries by recognizing and addressing early signs of skin integrity compromise.