A pressure ulcer, often known as a pressure sore or a bed sore, is an injury to the skin and underlying tissue caused when too much pressure is placed on the affected area.
This often happens to people who use a wheelchair or are confined to bed, even for a short period of time (for example, after surgery or an injury).
The constant pressure against the skin reduces the blood supply to that area and the affected tissue is broken down.
Friction (rubbing) of the skin can also contribute to a pressure ulcer.
Pressure ulcer categories
Pressure ulcers are divided into the following categories (sometimes known as “stages”):
Category 1: The skin is red but not broken. The area does not whiten if pressed with your finger. This is an early warning for you!
Category 2: Shallow, open wound or intact or broken blister
Category 3: Slightly deeper wound. May have yellowish tissue in it
Category 4: A deep wound, sometimes down to bone