What is the name of the skin disorder that can occur in people that are bedridden?

The skin disorder that occurs in people who are bedridden is frequently referred to as a decubitus ulcer. This term specifically describes localized damage to the skin and underlying tissue resulting from prolonged pressure or friction, typically over bony areas of the body. When individuals remain in one position for an extended period, blood flow can be restricted to those areas, leading to tissue ischemia and eventual ulceration.

While pressure sore and decubitus ulcer are often used interchangeably, "decubitus ulcer" is the more clinically accepted term in medical literature to describe this specific condition. It pinpoints the cause—pressure from lying down—and emphasizes the phenomenon of tissue breakdown in these situations. The other options provided, such as dermatitis and folliculitis, pertain to different types of skin conditions that do not typically arise from pressure related to immobility, but rather involve irritation (dermatitis) or inflammation of hair follicles (folliculitis).