Pressure sores are one of the few serious problems in home care that are largely preventable, and prevention is unglamorous: move the person regularly, look at the skin every day, keep it clean and dry, and feed them well. A sore can begin in a few hours of unrelieved pressure and take months to heal. Prevention is worth far more effort than treatment.
What is a pressure sore, and how fast can one form?
A pressure sore — also called a pressure ulcer, pressure injury, or bedsore — is damage to skin and the tissue beneath it caused by sustained pressure that cuts off blood supply. Without blood, the tissue starves and begins to die.
Two forces work alongside plain pressure. Shear happens when the skin stays put while the tissue underneath slides, which is exactly what occurs when someone is dragged up the bed instead of lifted, or slides down when the head of the bed is raised. Friction is the surface rub that strips fragile skin, from sheets, from a heel scuffing the mattress, from a poorly fitting sling.
Time matters more than most families expect. In a frail older adult with thin skin, poor circulation, and low nutrition, damage can start within a couple of hours of continuous pressure. That is one afternoon asleep in a wheelchair without shifting position, or one long night in the same position after a hard day.
The other unpleasant fact: the visible surface damage is often smaller than what lies beneath. Pressure damage frequently starts at the bone and works outward, so a small purple patch can sit on top of a much larger injury.
Who is most at risk?
Risk is not really about age. It is about immobility plus something else.
- Anyone who cannot reposition themselves independently in bed or a chair
- Someone recovering from a stroke, a hip fracture, or a long hospital stay
- People with diabetes or peripheral vascular disease, whose circulation and sensation are reduced
- People who are underweight, eating poorly, or dehydrated
- Anyone with incontinence, because moisture weakens skin
- People with dementia who cannot report discomfort
- Anyone who has had a pressure sore before — healed skin never regains full strength
Where do pressure sores form?
Sores form where bone sits close to the surface. Knowing the map is what makes a daily skin check quick instead of vague.
| Position | Highest-risk sites |
|---|---|
| Lying on the back | Tailbone and sacrum, heels, shoulder blades, elbows, back of the head |
| Lying on the side | Hip bone, outer knee, inner knees where they press together, ankle bones, ear |
| Sitting in a chair | Sitting bones, tailbone, shoulder blades, backs of the arms, heels |
| Anywhere | Under or beside medical devices: oxygen tubing, catheter lines, splints, braces, tight elastic |
Heels deserve special mention. They carry a small surface area, they have almost no padding, and they are easy to forget under a blanket. Floating the heels — placing a pillow lengthwise under the calves so the heels hang free, never a pillow directly under the heel — removes the pressure entirely.
How often should someone be repositioned?
The commonly used general guidance is roughly every two hours in bed and much more often in a chair, because sitting concentrates body weight on a far smaller area. Someone sitting up should shift, or be shifted, about every fifteen to thirty minutes.
The right interval for a particular person, though, comes from their clinical team, and it depends on their skin, their surface, and their risk. If a red mark is still visible when it is time to turn again, the interval is too long.
What makes repositioning actually happen is a written schedule, not good intentions. Post a simple rotation on the wall — back, left side, right side — and note the times. Practical points:
- Use a 30-degree tilt rather than rolling fully onto the hip bone; wedge pillows behind the back to hold it.
- Put a pillow between the knees and ankles when side-lying so bone does not press on bone.
- Keep the head of the bed as low as is safe. Above 30 degrees, the body slides and shear rises. Some conditions require the head raised, so ask.
- Lift rather than drag. Use a draw sheet or slide sheet with two people, or the equipment a therapist has provided.
- Float the heels with a pillow under the calves.
- Never massage a reddened area over a bone. It damages the tissue underneath.
Moving someone safely, repeatedly, without hurting them or yourself is a skill. This is the core of transfer and mobility assistance, and it is a common reason families bring in help: the spouse doing the turning is often seventy-eight years old with a bad back.
What should a daily skin check look for?
Once a day, in good light, with clean hands, look at all the pressure points. Bath time and dressing time make natural moments. Use a hand mirror or a phone camera for the sacrum and heels.
Signs to look for:
- Redness that does not fade after pressure is removed. On darker skin, look instead for an area that is darker, purplish, or blue-toned compared with the surrounding skin.
- Skin that feels warmer, cooler, firmer, boggier, or more swollen than the skin around it
- A blister, a scrape, or a shallow open area
- Pain, tenderness, itching, or a burning complaint at a specific spot
The pressing test is simple: press the red area gently with a finger. If it whitens and then returns to red, circulation is still reaching it. If it stays red, damage has begun and that area needs to be kept off pressure entirely, with the nurse or physician told promptly.
Moisture, incontinence, and why it matters so much
Skin that stays damp softens, weakens, and breaks down under far less pressure than dry skin. Urine and stool add irritation on top of the moisture, and stool is the more damaging of the two. Sweat under a plastic-backed pad does the same thing more slowly.
The practical routine is straightforward:
- Change wet or soiled products promptly rather than on a fixed clock
- Clean with warm water and a pH-balanced no-rinse cleanser; skip harsh soap and vigorous rubbing
- Pat dry, do not rub, and be thorough in skin folds
- Apply a barrier cream or ointment on every change to protect against the next episode
- Use breathable products and avoid layering two pads, which traps heat and moisture
- Never use a plastic sheet directly against skin
Handled well, this is also a dignity issue as much as a skin one. Careful, matter-of-fact incontinence and hygiene care protects skin and self-respect at the same time, and it is one of the tasks families find hardest to do for a parent.
Nutrition, hydration, and healing
Skin is built from protein and repaired with it. Someone who is eating little, losing weight, or drinking poorly is at markedly higher risk, and a sore that has formed will not close without the raw materials.
Useful habits: protein at every meal rather than only at dinner; small frequent meals when appetite is poor; fluids offered regularly and not only when asked for; and fortified foods when volume is the limit. A physician or dietitian should be the one to recommend supplements, and unexplained weight loss deserves a medical conversation rather than a shopping trip. Practical support with meal preparation often does more for skin than any cream.
Surfaces, cushions, and equipment
Equipment reduces pressure. It does not replace repositioning, and no mattress removes the need to turn.
- Mattresses. Foam or air overlays and alternating-pressure mattresses spread the load. Which one is appropriate is a clinical judgment, and equipment for a genuine medical need may be covered by insurance with a physician's order.
- Chair cushions. Anyone sitting for long stretches needs a proper pressure-redistributing cushion. A folded towel or a donut ring is not one; ring cushions concentrate pressure around the rim and make things worse.
- Bedding. Smooth, wrinkle-free sheets. A fold or a crumb under a hip becomes a pressure point in a frail person.
- Clothing. No thick seams, hard buttons, or tight elastic at pressure points, and nothing left in a back pocket.
- Devices. Check under and around oxygen tubing, catheters, splints, and braces daily.
An existing wound is a nurse's job, not a caregiver's
This line matters, so it is worth stating flatly. We are a licensed non-medical home care agency, licensed in Texas for Personal Assistance Services. Our caregivers do not perform wound care. They do not clean, pack, debride, or dress a pressure sore, apply prescription wound products, or change a dressing. They do not remove a dressing to look underneath.
If a sore exists, it belongs to a clinician — the physician, and usually a home health or wound care nurse who assesses it, stages it, and directs treatment. Home health nursing and non-medical home care commonly run side by side in the same house, and that is the right arrangement.
What a non-medical caregiver does contribute is substantial: keeping the repositioning schedule, keeping the person clean and dry, floating the heels, preparing food that supports healing, encouraging fluids, keeping the bed smooth, and noticing and reporting a change early. Prevention and observation are exactly where the hours go.
When to call for help the same day
- Any open area, blister, or skin break over a bony point
- Redness that does not blanch when pressed, or a dark patch that is new
- Increasing pain at a pressure point
- An existing sore that grows, smells, drains, or develops surrounding redness and warmth
- Fever, chills, or new confusion in someone with a wound — these can signal infection and warrant urgent medical attention
This article is educational and is not medical advice. Repositioning intervals, equipment, nutrition, and any treatment of an existing wound must be directed by the physician and nurse who know the person. If someone in North Texas is spending most of the day in a bed or a chair, contact our care team for a free in-home assessment. Visits are four hours or longer at one flat hourly rate, the same day, evening, weekend, or overnight, and care can often start within twenty-four hours.