Pressure Ulcer

What is pressure ulcer?

A pressure ulcer is an area of damaged skin and underlying tissue that develops when sustained pressure reduces blood flow to a part of the body. Pressure ulcers are also known as pressure sores, bedsores, pressure injuries, or decubitus ulcers. When blood cannot reach the skin and the tissues beneath it, those tissues do not receive enough oxygen and nutrients, and they begin to break down. In medical coding systems, an unspecified pressure ulcer is classified under ICD-10 code L89.90.

For anyone asking what is pressure ulcer in simple terms: it is a wound caused by pressure, friction, or shear (a dragging force on the skin) rather than by a cut or infection from outside the body. These wounds most often form over bony areas where the skin is thin and there is little cushioning fat or muscle. Common sites include the tailbone (the sacrum and coccyx, the bones at the base of the spine), the hips, the heels, the ankles, the shoulder blades, the back of the head, and the ears.

Pressure ulcers mainly affect people who have limited mobility — for example, people who are confined to a bed or wheelchair, people recovering from surgery or serious illness, older adults with frailty, and people with conditions that reduce sensation, such as spinal cord injury or advanced diabetes. However, anyone who stays in one position for long periods without shifting their weight can develop one. Pressure ulcers range from mild reddened skin to deep wounds that expose muscle or bone, and severe ulcers can become life-threatening if they lead to serious infection.

Symptoms of a pressure ulcer

Pressure ulcer symptoms depend on how deep the tissue damage goes. Clinicians commonly describe pressure ulcers in stages, from early skin changes to deep open wounds. Recognizing the earliest signs is important, because early-stage damage is often reversible if pressure is relieved promptly.

Common signs and symptoms include:

• Skin discoloration — a patch of skin that looks red on lighter skin, or purple, blue, or darker than the surrounding skin on darker skin tones, and that does not fade when pressed.
• Changes in skin texture or temperature — the area may feel unusually warm or cool, firm, boggy (soft and swollen), or spongy compared with nearby skin.
• Pain, tenderness, or itching over a bony area, especially after lying or sitting in one position.
• A blister or shallow open sore — the outer layer of skin may break, leaving a raw, pink or red wound.
• A deeper crater-like wound — in more advanced ulcers, the wound extends into the fat layer and may show yellowish dead tissue (called slough) or dark, leathery dead tissue (called eschar).
• Exposed muscle, tendon, or bone in the most severe ulcers.
• Drainage or odor — fluid, pus, or an unpleasant smell from the wound can suggest infection.

Symptoms typically differ by stage. In the earliest stage, the skin is intact but discolored and may be painful. In the next stage, there is partial skin loss, often looking like a shallow open sore or a burst blister. Deeper ulcers involve full-thickness skin loss, meaning the wound goes through all skin layers into the fat beneath. The most severe ulcers extend down to muscle or bone. Some ulcers are described as “unstageable” because dead tissue covers the wound base and hides how deep it goes, and some are called “deep tissue injuries,” where the surface skin is intact but the tissue underneath is already damaged, appearing as a deep purple or maroon area.

People with reduced sensation may not feel pain from a developing ulcer, which is one reason regular skin checks are so important for those at risk. Fever, spreading redness, increasing pain, or feeling generally unwell alongside a pressure ulcer can signal infection and needs prompt medical attention.

Causes and risk factors

The direct pressure ulcer causes are mechanical forces on the skin combined with the body’s inability to tolerate or escape those forces. Three forces are usually involved:

• Pressure — constant pressure on a body area, especially over a bone, squeezes small blood vessels shut. Without blood flow, tissue can begin to die within hours.
• Friction — rubbing of the skin against bedding, clothing, or other surfaces, which makes fragile skin more vulnerable, particularly when the skin is moist.
• Shear — a sliding force that occurs, for example, when a person slides down in a bed or chair. The skin stays in place while deeper tissues move, stretching and tearing blood vessels beneath the surface.

Several factors increase the risk of developing a pressure ulcer:

• Immobility — being unable to change position independently because of illness, injury, sedation, paralysis, or weakness.
• Loss of sensation — conditions such as spinal cord injury, stroke, or nerve damage from diabetes (neuropathy) prevent a person from feeling the discomfort that normally prompts movement.
• Poor nutrition and dehydration — the skin needs adequate protein, calories, fluids, vitamins, and minerals to stay healthy and to repair itself.
• Moisture — prolonged exposure to sweat, urine, or stool softens and weakens the skin, a problem often linked to incontinence (loss of bladder or bowel control).
• Poor circulation — conditions such as diabetes, peripheral artery disease (narrowed arteries in the limbs), and heart failure reduce blood flow to the skin.
• Older age — with age, skin becomes thinner, drier, and less elastic, and the protective fat layer often shrinks.
• Serious illness or recent surgery — critically ill patients and people recovering from major operations frequently spend long periods lying still.
• Medical devices — pressure from tubing, masks, casts, braces, or other equipment resting against the skin can cause device-related pressure injuries.

In many cases, several of these factors are present at once — for example, an older adult who is bedbound after a hip fracture, eating poorly, and managing incontinence faces a substantially higher risk than someone with only one risk factor.

Diagnosis

Pressure ulcer diagnosis is primarily clinical, meaning it is based on a careful physical examination rather than laboratory tests. A doctor or wound-care nurse will examine the wound and the surrounding skin and will usually assess:

• Location, size, and depth of the wound, often measured and documented at each visit to track healing or worsening.
• Stage of the ulcer, using standardized staging systems that classify the wound by how deep the tissue damage goes.
• The wound base — whether it contains healthy tissue, slough, or eschar, and whether there is undermining or tunneling (damage extending under intact skin at the wound edges).
• Signs of infection — redness spreading beyond the wound, warmth, swelling, pus, odor, or fever.
• Overall health — mobility, nutrition, circulation, continence, and other conditions that affect healing.

Additional tests are used when needed rather than routinely. Your doctor may order:

• Blood tests to check for infection, anemia (low red blood cell count), nutritional status such as protein levels, and blood sugar control in people with diabetes.
• Wound cultures — samples of tissue or fluid from the wound to identify bacteria when infection is suspected, which helps guide antibiotic choice.
• Imaging — X-rays, computed tomography (CT), or magnetic resonance imaging (MRI) may be used if the doctor suspects the infection has reached the bone, a serious complication called osteomyelitis. In some cases a bone biopsy (taking a small sample of bone) is needed to confirm bone infection.

Doctors also use risk-assessment tools, such as structured scoring scales, to identify people who are likely to develop pressure ulcers so that preventive measures can be started early. If you or a family member is admitted to a hospital or long-term care facility, skin assessments on admission and at regular intervals are a standard part of care.

Treatment options

Pressure ulcer treatment depends on the stage of the ulcer, whether it is infected, and the person’s overall health. The single most important principle across all stages is relieving the pressure that caused the wound — no dressing or medication can heal an ulcer if constant pressure continues.

Pressure relief and repositioning

Care teams typically recommend regular repositioning — for example, turning a bedbound person on a schedule and encouraging wheelchair users to shift their weight frequently. Special support surfaces, such as pressure-redistributing mattresses, overlays, and cushions, help spread body weight more evenly. Heels are often protected by devices or pillows that keep them off the bed entirely.

Wound care and dressings

Keeping the wound clean and appropriately moist supports healing. Wounds are usually cleaned with saline (sterile salt water) or other gentle solutions, and covered with dressings chosen to match the wound — for example, dressings that maintain moisture, absorb drainage, or protect fragile skin. Dressings are changed on a schedule set by the care team. For deeper wounds, a technique called negative pressure wound therapy (a sealed dressing connected to a gentle vacuum) is sometimes used to help remove fluid and encourage tissue growth.

Debridement

Debridement means removing dead or infected tissue from the wound so that healthy tissue can heal. This can be done in several ways: surgically with instruments, with special enzyme-containing ointments that dissolve dead tissue, with dressings that support the body’s own cleanup process, or in some centers with other specialized methods. The choice depends on the wound, the urgency, and the patient’s condition.

Medications

Antibiotics are used when there is a wound infection, spreading skin infection (cellulitis), bone infection, or bloodstream infection — not for every ulcer, because many ulcers carry bacteria on their surface without true infection. Pain management is also part of treatment, since pressure ulcers and dressing changes can be painful. Nutritional support, including adequate protein and calories and correction of deficiencies, is commonly recommended to give the body the building blocks it needs to heal.

Watchful waiting and conservative care

Early-stage ulcers with intact skin often improve with pressure relief, skin protection, and moisture management alone, without procedures. Even deeper ulcers are frequently managed conservatively with good wound care over weeks to months, with the care team monitoring progress and adjusting the plan if healing stalls.

Surgery

Large or deep ulcers that do not heal with conservative care, or ulcers that expose bone, may need surgical repair. The most common reconstructive operation is flap surgery, in which a surgeon moves a section of the patient’s own skin, fat, and sometimes muscle to fill and cover the wound with healthy, well-supplied tissue. Skin grafts (thin layers of skin moved from another body site) are used in selected cases. Reconstructive procedures of this kind are generally performed by specialists in plastic, reconstructive and aesthetic surgery; at hospital groups such as Acibadem, complex pressure ulcer reconstruction is managed within this specialty, often in coordination with wound-care, infectious disease, and rehabilitation teams. Surgery is a significant undertaking, and success depends heavily on continued pressure relief and good nutrition afterward, because a repaired area can break down again if the original risk factors are not controlled.

Living with pressure ulcer and outlook

The outlook for a pressure ulcer varies widely. Early-stage ulcers often heal within days to weeks once pressure is relieved and the skin is protected. Deeper ulcers can take months to close, and some very deep or complicated wounds heal slowly or incompletely, particularly in people with poor circulation, uncontrolled diabetes, poor nutrition, or ongoing immobility. Honest expectations matter: healing is usually possible but rarely quick for advanced ulcers, and recurrence is common if the underlying causes are not addressed.

Day-to-day management for people living with, or at risk of, a pressure ulcer often includes:

• A repositioning routine — changing position regularly in bed and shifting weight frequently when seated.
• Daily skin checks — inspecting bony areas (or having a caregiver inspect them) for early color or texture changes, ideally in good light and, when needed, with a mirror.
• Skin care — keeping skin clean and dry, using moisturizers on dry skin, and managing incontinence promptly with gentle cleansing and barrier creams.
• Nutrition and hydration — eating enough protein and calories and drinking adequate fluids, with dietitian input when appetite or intake is poor.
• Appropriate equipment — using prescribed cushions, mattresses, and heel protectors correctly, and avoiding donut-shaped cushions, which can concentrate pressure at their edges.
• Managing underlying conditions — controlling blood sugar, avoiding smoking (which impairs blood flow and healing), and treating circulation problems.

Serious complications are possible with advanced ulcers, including cellulitis, bone and joint infections, and sepsis (a dangerous body-wide response to infection). This is why worsening wounds and signs of infection should never be watched at home without medical input. With consistent prevention, careful wound care, and treatment of contributing conditions, many people achieve healing and can reduce the chance of new ulcers, although no approach can guarantee that an ulcer will not recur.

Frequently asked questions

What is a pressure ulcer in simple terms?

A pressure ulcer is a wound that forms when constant pressure cuts off blood flow to an area of skin and the tissue beneath it, usually over a bony spot such as the tailbone, hips, or heels. It is often called a bedsore or pressure sore. It can range from a patch of discolored, intact skin to a deep open wound, depending on how long the pressure lasted and how vulnerable the skin was.

Can a pressure ulcer heal on its own?

Early-stage ulcers with intact or only shallowly broken skin often heal once the pressure is relieved and the skin is kept clean, dry, and protected. Deeper ulcers generally do not heal without structured wound care, and they can worsen quickly if pressure continues. Even mild-looking skin changes deserve attention from a healthcare professional, because the damage under the surface may be greater than it appears.

How serious is a pressure ulcer?

Seriousness depends on the stage. Early ulcers are usually manageable and often reversible. Deep ulcers that reach muscle or bone are serious wounds that can become infected, and infections can spread to the bone or bloodstream, which can be life-threatening. Any pressure ulcer in a person who is frail, has diabetes, or has poor circulation should be evaluated and monitored by a medical professional.

What are the first pressure ulcer symptoms to watch for?

The earliest signs are usually a patch of skin over a bony area that stays red or discolored even after pressure is removed, does not blanch (turn pale) when pressed, and may feel warmer, cooler, firmer, or softer than nearby skin. Pain, tenderness, or itching in the area is also common. On darker skin, the change may look purple, blue, or simply darker than the surrounding skin, so texture and temperature changes are especially important clues.

How long does pressure ulcer treatment take?

Healing time varies with the depth of the wound and the person’s overall health. Early-stage ulcers often improve within days to a few weeks with good pressure relief. Deeper ulcers frequently take several weeks to months of consistent wound care, and some require surgery. Your care team can give a more realistic timeline after assessing the wound, and honest follow-up matters because stalled healing may mean the treatment plan needs adjusting.

What causes pressure ulcers in bedridden patients?

In bedridden patients, ulcers develop because body weight presses the skin against the mattress over bony points for long periods, squeezing blood vessels shut. Friction from sliding on sheets, shear forces when the head of the bed is raised, moisture from sweat or incontinence, and poor nutrition all add to the risk. Regular repositioning, pressure-redistributing mattresses, skin care, and good nutrition are the main preventive measures.

When is surgery needed for a pressure ulcer?

Surgery is generally considered for deep ulcers that expose muscle or bone, ulcers that fail to heal despite months of good conservative care, or wounds with extensive dead tissue that must be removed. Reconstructive operations such as flap surgery use the patient’s own healthy tissue to cover the wound. Surgery is not a quick fix — its success depends on continued pressure relief, infection control, and nutrition after the operation.

When to see a doctor

Contact a healthcare professional promptly if you or someone you care for develops a suspicious skin change over a bony area, especially if the person has limited mobility. Early evaluation can prevent a minor skin change from becoming a deep wound.

Seek urgent medical attention for any of the following red-flag warning signs:

• Fever or chills in a person with a pressure ulcer, which may indicate a spreading infection.
• Redness, warmth, or swelling spreading outward from the wound into the surrounding skin.
• Pus, increasing drainage, or a foul odor from the wound.
• Rapidly increasing pain at or around the ulcer, or new pain in a wound that was previously painless.
• Black or rapidly darkening tissue in or around the wound.
• Exposed muscle, tendon, or bone in the wound base.
• Confusion, drowsiness, rapid heartbeat, or feeling very unwell, which can be signs of sepsis and require emergency care.
• A wound that is getting larger or deeper despite home care, or any ulcer that shows no improvement over one to two weeks of appropriate care.

People at high risk — including those with spinal cord injuries, diabetes, poor circulation, or long-term immobility — benefit from regular skin assessments even before any wound appears. If you are unsure whether a skin change is a developing pressure ulcer, it is safer to have it examined early rather than to wait.