Symptoms of a pressure ulcer are:
- Red skin that gets worse over time
- The area forms a blister, then an open sore
Pressure sores most commonly occur on the
- Back of head
Pressure sores categorized as deep tissue injury may be purple or maroon. This may be an area of skin or blood-filled blister due to damage of soft tissue from pressure. The area around may be sore, firm, mushy, boggy, warmer, or cooler compared with tissue nearby.
Pressure sores are grouped by their severity. Stage I is the earliest stage. Stage IV is the worst.
- Stage I: A reddened area on the skin that, when pressed, does not turn white. This is a sign that a pressure ulcer is starting to develop.
- Stage II: The skin blisters or forms an open sore. The area around the sore may be red and irritated.
- Stage III: The skin now develops an open, sunken hole called a crater. There is damage to the tissue below the skin.
- Stage IV: The pressure ulcer has become so deep that there is damage to the muscle and bone, and sometimes to tendons and joints.
Pressure sores are unstageable when the tissue at the base of the ulcer is covered by dead skin that is yellow, tan, green, or brown.