Pressure Sores and Advanced Dementia: Why Repositioning Matters

As dementia progresses, mobility often reduces too, sometimes gradually, sometimes quite suddenly after an illness or a fall. Someone who's spending more time in bed or in a chair, and who may no longer be able to tell you they're uncomfortable, is at real risk of developing a pressure sore, and it can happen faster than most families expect.

This isn't the most talked-about part of caring for someone with advanced dementia, but it's one of the most preventable, if you know what to look for and what to actually do.

What a Pressure Sore Actually Is

The NHS calls these pressure ulcers, pressure sores, or bed sores, and they're all the same thing: damage to the skin and the tissue underneath, caused by sustained pressure on one area cutting off blood supply to the skin. They develop most often over bony parts of the body that carry weight for long periods, the tailbone, hips, heels, elbows, shoulder blades, and the back of the head.

They can develop gradually, but sometimes appear within just a few hours, particularly in someone who's frail, has thin skin, isn't eating or drinking much, or has reduced sensation. That speed is exactly why regular checking matters more than most families realise.

The Warning Signs to Watch For

The earliest stage is often the easiest to miss, especially on skin you're not used to inspecting closely. Look for:

• Discoloured skin that doesn't fade when pressed. On lighter skin this usually looks red; on darker skin it's more likely to appear purple, blue, or simply darker than the skin around it. A useful test: press the area gently, if it turns white or pale and then returns to colour, that's normal. If the colour stays the same, that's an early warning sign.
• Skin that feels warm, hard, or boggy compared to the area around it.
• Signs of discomfort in that spot, even if your family member can't put it into words, wincing, pulling away, or general unsettledness when that area is touched or when they're moved.

Left unchecked, this can progress to blistering and then an open wound. Early sores, caught and treated promptly, heal far faster and far more easily than ones that have been allowed to develop.

Repositioning: What the Guidance Actually Says

Regular repositioning is the single most effective way to prevent pressure sores in someone with reduced mobility. NICE guidance is specific about frequency:

• At least every 6 hours for someone considered at risk
• At least every 4 hours for someone considered at high risk

What counts as "at risk" versus "high risk" depends on the individual, mobility, skin condition, nutrition, continence, and general frailty all play a part. This is worth asking a GP, district nurse, or the care home's nursing team to confirm directly for your family member, rather than guessing. If you're caring at home, you can also ask a GP for a formal pressure sore risk assessment.

Repositioning doesn't have to mean a dramatic change of position each time. Small shifts, a slight tilt onto one side rather than lying flat, a change in how someone's sitting in a chair, genuinely help redistribute pressure away from the same point.

Practical Things That Help

• Check vulnerable areas daily, particularly the tailbone, hips, heels, and elbows. A hand mirror can help you see areas that are hard to view directly.
• Keep skin clean and dry, moisture from incontinence or sweat makes skin more vulnerable to damage.
• Support good nutrition and hydration where possible, poor nutrition is a real risk factor, and it's worth mentioning to a GP or dietitian if eating has become difficult.
• Ask about pressure-relieving equipment. Specialist mattresses and cushions genuinely help and are often available through the NHS or social care, ask a district nurse or occupational therapist whether your family member would benefit from one.
• Avoid dragging or sliding someone when repositioning them, this creates friction and shear that can damage skin even without direct pressure. If you're supporting someone to move and it feels difficult or risky to do alone, ask for a proper manual handling assessment rather than managing it alone.

If a Pressure Sore Has Already Developed

Prevention doesn't always work, even with the best care, and that's not a reflection of anyone failing at their job. If a pressure sore has developed, here's what typically happens next and how to be involved in it properly.

• Get it properly assessed. A GP, district nurse, or the care home's nursing team should assess the sore and put together a treatment plan. For anything beyond the earliest stage, ask specifically whether a tissue viability nurse is involved, they're the specialists in wound healing and pressure damage.
• Treatment depends on the stage. Early-stage sores, where skin is intact but discoloured, are often managed with a barrier cream to protect the area and relieving all pressure from it completely. Once skin has broken, treatment usually moves to specialist wound dressings chosen to keep the area appropriately moist and protected, cleaning at each dressing change, and continued repositioning. A GP or nurse may also prescribe a barrier cream or film, this is a clinical decision based on the specific wound, not something to choose yourself from a pharmacy shelf.
• Watch for signs of infection. Increasing redness or swelling spreading beyond the original area, pus or an unpleasant smell, a fever, or the person seeming more unwell or confused than usual, these need medical attention the same day, not a routine appointment. Infected pressure sores can become serious quickly, particularly in someone who's already frail.
• Support nutrition and hydration. Healing skin needs protein and fluids to repair itself, so this is often part of a treatment plan too, not a separate conversation.
• Expect healing to take time. Early-stage sores can improve within days to a couple of weeks with proper care. Deeper wounds can take months, and need consistent, ongoing attention rather than a quick fix. Slow progress with a deep sore isn't necessarily a sign that something's wrong.

Raising Concerns With a Care Home

If your family member is in a care home and you're worried about a pressure sore, whether it's developed there or you're concerned about how it's being managed, you're entitled to ask direct questions. This isn't confrontational, it's a normal part of good communication between families and care staff. Reasonable things to ask for:

• To see the wound care plan for that specific sore, what treatment is being given and how often it's being reviewed
• How often your family member is being repositioned, and whether that matches what's clinically appropriate for them
• Whether a tissue viability nurse or district nurse has been involved
• To be told promptly if the sore isn't improving, gets worse, or shows signs of infection

If you're not getting clear answers, or you remain concerned after raising it directly with the care team, you can ask to speak to the home's manager, and you can also contact the local authority's safeguarding team if you believe care has genuinely fallen short. Most of the time, though, raising it directly and asking specific questions is enough to get things back on track.

If You're Worried

If you notice any of the early warning signs, contact a GP, district nurse, or the care home's nursing team straightaway rather than waiting to see if it improves on its own. This is a genuinely common part of caring for someone with reduced mobility, not a sign that anything has been done wrong, and raising it early is exactly the right thing to do.

You don’t have to navigate it alone.