In the very beginning, a bed sore looks like a persistent red or discolored patch of skin over a bony area, usually the tailbone, heel, hip, or shoulder blade. The skin is still intact, with no open wound or blister. What sets it apart from ordinary redness is that the color doesn’t fade when you press on it and release. If you’re seeing this on yourself or someone you’re caring for, you’re catching it at the earliest and most treatable stage.
The Key Visual Sign: Redness That Won’t Fade
On lighter skin, an early bed sore (classified as a stage 1 pressure injury) appears as a localized red patch. It often looks similar to a mild sunburn or irritation, which is why it’s easy to dismiss. The critical difference is what happens when you press a fingertip into the red area and then lift it away. Healthy skin briefly turns white (blanches) under pressure, then returns to its normal color. An early bed sore stays red the entire time. If the redness persists for more than 20 minutes after all pressure is removed from the area, that’s a strong indicator of tissue damage underneath.
How It Looks on Darker Skin
On darker skin tones, the classic redness may not be visible at all. Instead, the earliest color change often appears as a purple, blue, or ashen patch. Nurses and wound care specialists note that what gets labeled a “bruise” on a patient with dark skin is frequently an unrecognized pressure injury. Because the blanching test is unreliable on deeply pigmented skin, you need to rely on other signs: a patch that looks noticeably different in color from the surrounding skin, or an area that feels distinctly different when you touch it.
What It Feels Like to the Touch
An early bed sore often reveals itself through texture and temperature before it’s visually obvious. The affected skin may feel warmer than the surrounding area, or occasionally cooler. It can feel unusually firm or hard, almost like a knot just beneath the surface. In some cases, the tissue feels the opposite: soft, spongy, or “boggy,” as if there’s fluid trapped underneath. The person with the sore may notice pain, tenderness, or itching at the spot, even before the skin looks clearly abnormal. Running your hand lightly across the area and comparing it to the skin a few inches away is one of the simplest ways to detect these changes early.
Where to Check First
Early bed sores develop over bony prominences, the spots where bone sits close to the skin surface without much muscle or fat for cushioning. The exact locations depend on how the person spends most of their time.
For someone who is mostly bedridden, the highest-risk areas are:
- Tailbone and lower back
- Heels and ankles
- Shoulder blades
- Back or sides of the head
- Skin behind the knees
- Hips
For someone who uses a wheelchair, the pattern shifts. The tailbone and buttocks bear the most sustained pressure, followed by the shoulder blades, spine, and the backs of the arms and legs where they rest against the chair. These are the spots to inspect daily, ideally with a mirror or a caregiver’s help for areas that are hard to see directly.
How It Differs From Normal Skin Irritation
Rashes, friction burns, and general irritation can all cause redness in the same areas. A few features distinguish an early pressure injury. First, location matters: if the discoloration sits directly over a bone where the body has been resting, that’s more suspicious than a random patch of irritation. Second, the blanching test described above is the most reliable visual check. Third, the combination of color change with a temperature or firmness difference underneath is a hallmark of pressure damage specifically. Simple irritation from moisture or friction typically feels uniformly warm and soft, without the hard or boggy quality underneath.
One important distinction: if the discolored patch is purple or maroon rather than red, that may indicate a deep tissue pressure injury, meaning damage to the layers well below the skin surface. This can look deceptively mild on the outside while concealing significant harm underneath, and it needs prompt professional attention.
What to Do When You Spot One
Stage 1 pressure injuries are fully reversible, but they can worsen quickly if the pressure continues. The single most important step is removing all pressure from the affected area immediately. If the sore is on the tailbone, reposition the person onto their side. If it’s on a heel, prop the leg up on a pillow or foam cushion so the heel floats free of the mattress. The goal is zero contact between the sore and any hard surface.
A soft red patch that stays discolored for 30 minutes or more after pressure is relieved warrants a call to a healthcare professional. In the meantime, keep the skin clean and dry, and reduce friction between the skin and bedding. Specialized powders or barrier creams from medical supply stores can help with this. Avoid massaging the discolored area directly, as this can cause further damage to tissue that’s already compromised.
With consistent pressure relief, a stage 1 sore can begin improving within days. But leaving it unaddressed, even for a short time, allows the damage to progress to an open wound that takes far longer to heal and carries a real risk of infection.