Pressure ulcer stages: how to spot bedsores early and prevent them
Bedsores start as a red patch that can still heal. The four pressure ulcer stages, where to check the skin, and the daily routine that prevents them.
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A bedsore doesn't start as a wound. It starts with weight pressing on one spot for too long. When a heel, a hip or the tailbone rests against a mattress or chair without relief, the small blood vessels underneath are squeezed shut, and the tissue they feed begins to die, often before the surface shows much at all. Knowing the pressure ulcer stages helps you recognize that damage early, when it can still heal.
The encouraging part is that pressure injuries are largely preventable, and the first stage usually reverses if someone notices and acts. This guide covers how a sore forms, where to look, what each stage means, and the daily routine that keeps most of them from happening at all.
How a pressure sore forms
Two forces do the harm. Pressure is the direct squeeze of body weight on skin over a bone, which closes the tiny vessels until the tissue is starved of oxygen. Shear is a sideways drag. It happens when someone slides down in a propped-up bed or is pulled rather than lifted across the sheets, and it stretches and tears the deeper tissue. Friction and moisture from sweat or incontinence weaken the skin further.
That is why the people at risk are the ones who can't easily shift their own weight: someone recovering from a stroke or surgery, living with advanced dementia, or too weak to turn without help. The rest of us make small, unconscious adjustments all day. They don't, and if sensation is poor they may not feel the ache that would make them move. Thin skin, poor nutrition and dehydration add to the risk. The common thread is staying still, and that is the thing a caregiver can change.
The places to check first
Sores show up where bone sits close to the skin. Anyone at risk should have a daily skin check, in good light, with a gentle feel for warmth, hardness or a spongy softness that doesn't match the skin around it.
- In bed: the tailbone and lower back, the heels, the hips, the shoulder blades, the elbows, the back of the head and the ears.
- In a chair or wheelchair: the tailbone and buttocks, the shoulder blades and spine, and the backs of the arms and legs where they rest against the chair.
The heels and the tailbone catch families off guard most often because blankets and clothes hide them. Pull back the covers and look at the heels every day. If your parent has diabetes or numb feet, fold this into the same daily foot check.
The four stages, one by one
Doctors and nurses grade pressure injuries using the National Pressure Injury Advisory Panel's scale. The stages describe how deep the damage goes, not how long it has been there. A sore can move from a red patch to an open wound quickly if the pressure continues.
| Stage | What you see | How deep it goes |
|---|---|---|
| Stage 1 | Unbroken skin with a patch that stays red, or darker on dark skin, when pressed; may feel warmer, cooler, firmer or more tender | Surface; the skin is not broken |
| Stage 2 | A shallow open sore with a pink or red base, or a blister | The top layers of skin are lost |
| Stage 3 | A deeper, crater-like wound; fat may be visible | All layers of skin, into the fat; no exposed muscle or bone |
| Stage 4 | A deep wound where muscle, tendon or bone can be seen or felt | Through skin and fat to muscle, tendon or bone |
Two more categories sit outside the numbers, and both need professional care. An unstageable injury is a deep wound covered by dead tissue, soft yellow or gray slough or a dry, dark scab called eschar, so its depth can't be seen. Underneath, it is a Stage 3 or 4. A deep tissue injury is a persistent maroon or purple area on skin that is still intact, sometimes with a blood-filled blister, and it signals serious damage below.
Stage 1 is your window
Almost everything that can go right with a pressure sore happens at Stage 1. The skin is still whole, and the problem is usually still reversible. It comes down to a test you can do with a fingertip.
Press gently on the reddened area and lift your finger. Healthy skin goes pale for a moment, then flushes back as blood returns. In a Stage 1 injury the color stays. On darker skin the area may look purple or darker rather than red, so feel for a difference in warmth or firmness too. When you find one, take all weight off the spot, keep it clean and dry, reposition on a strict schedule, and check that it is shrinking over the next day. If it isn't, or the skin breaks, call the doctor or nurse.
Past Stage 1, it is a wound for a nurse
Once the skin is broken, at Stage 2 and beyond, you are looking at a medical wound. An open pressure sore can become infected, and a deep one can become serious quickly. A nurse or doctor should look at any broken skin, choose the dressing and set the treatment plan. Cleaning and dressing an open sore, removing dead tissue and managing infection are skilled clinical work, not jobs for a family member or a non-medical caregiver.
There are a lot of home remedies online, so it's worth being plain. Don't put ointments on an open sore unless the nurse or doctor says to. Don't massage a red or broken area. Never pick at or peel a dry, stable scab on a heel, which is protecting the wound underneath. What a caregiver does around a diagnosed wound still matters a great deal: keeping pressure off it, keeping the skin around it clean and dry, watching for changes and following the nurse's instructions.
The daily routine that prevents most of them
Prevention doesn't take medical training. It takes consistency, every day, including the overnight hours.
- Reposition on a schedule. At least every two hours in bed, and about every hour in a chair, with small weight shifts every 15 minutes or so for someone who can manage them. Set a timer.
- Float the heels. Put a pillow lengthwise under the calves so the heels hang free of the mattress.
- Use the right surface. A pressure-redistributing foam or air mattress and a good chair cushion spread the weight. Skip donut-shaped rings, which press on the skin around the hole.
- Keep the head of the bed low. No higher than about 30 degrees when it's safe, since sitting propped up for hours slides the body down and drags on the tailbone.
- Keep skin clean and dry. Change wet or soiled clothing and pads promptly, use a barrier cream against moisture, and moisturize dry skin without rubbing bony areas.
- Feed the skin. Skin needs protein, calories and fluid to hold together and heal. Regular meals and steady drinking, and watching for dehydration, are part of prevention.
- Lift, don't drag. Use a draw sheet or lift to move someone up in bed or into a chair.
- Check the skin every day. Make it part of the bath or a clothing change, so a Stage 1 mark is found while it is still just a mark.
A second set of eyes on the skin
Every step on that list is ordinary, which is why bedsores are usually a problem of attention rather than difficulty. The routine only works if someone does it every two hours, every day, including overnight. For a family stretched thin, or living an hour away, that is hard to keep up alone.
This is where a trained caregiver helps. Turning on schedule, floating the heels, prompt changes after incontinence, keeping meals and fluids on track and a real daily skin check are all part of personal care. For someone with limited movement, mobility care centers on safe transfers and repositioning. When a person needs turning through the night, 24-hour home care keeps the two-hour schedule going through the night. Families in Middlesex County call us when they need that kind of steady help, and anything that looks like broken skin goes straight to the nurse or doctor.
The skin breaks last
Pressure damage builds underneath, over hours, so the chance to stop it comes well before there is anything dramatic to see. A patch that stays red when pressed is an early warning, and it goes to whoever is paying attention.
Look at the skin every day, especially the heels and the tailbone, and never let someone at risk sit or lie in one position for hours. Caught at Stage 1, most pressure injuries heal. If you are caring for someone who can't easily move on their own and want help holding that routine, talk with us about a daily plan.
Common questions
Click or tap a question to see the answer.
What are the four stages of a pressure ulcer?
Stage 1 is intact skin with a patch of redness that doesn't blanch, or turn pale, when pressed; on darker skin it may look purple or darker rather than red. Stage 2 is partial-thickness skin loss: a shallow open sore with a pink or red base, or an intact or burst blister. Stage 3 is full-thickness skin loss into the fat beneath, often looking like a crater, without exposed muscle or bone. Stage 4 is full-thickness loss with muscle, tendon, ligament, cartilage or bone visible or directly felt. Two more categories sit outside the numbers: an unstageable injury, covered by dead tissue that hides its depth, and a deep tissue injury, a persistent maroon or purple area of intact skin. These definitions come from the National Pressure Injury Advisory Panel.
Can a stage 1 pressure sore heal on its own?
Usually, if the pressure is taken off quickly. In Stage 1 the skin is still intact; the tissue underneath is stressed but hasn't broken down. Keep all weight off the spot, keep it clean and dry, reposition on a schedule and check that the redness is fading rather than spreading. If it isn't improving within a day or two, or the skin breaks, call the doctor or nurse. Left under continued pressure, a Stage 1 area can become an open Stage 2 sore.
How often should you reposition someone to prevent bedsores?
The usual guidance is to change the position of someone in bed at least every two hours, and of someone sitting in a chair or wheelchair about every hour, with small weight shifts every 15 minutes or so if they can manage them. A pressure-redistributing mattress or cushion helps, and a nurse may adjust the schedule for the person's skin and mobility. The simple rule for families: nobody at risk should sit or lie in one position for hours without a change.
What is an unstageable pressure injury?
An unstageable pressure injury is a deep wound whose true depth can't be seen because its base is covered by dead tissue, either slough, which is soft and yellow, tan or gray, or eschar, a dry, dark, leathery scab. Underneath, it is a Stage 3 or Stage 4 wound. It needs assessment by a nurse, doctor or wound care specialist. Stable, dry, intact eschar on a heel acts as a natural cover and should not be picked at or removed at home.
Where do bedsores form most often?
Over bony areas with little padding between bone and skin. For someone who spends long hours in bed, the highest-risk spots are the tailbone and lower back, the heels, the hips, the shoulder blades, the elbows, the back of the head and the ears. For someone in a wheelchair or recliner, they are the tailbone, the buttocks and sitting bones, the shoulder blades and spine, and the backs of the arms and legs where they rest against the chair. Check these first in a daily skin check.
