What Are Bed Sores, What Causes Them, And How Can They Be Prevented?

Bedsores—also referred to as pressure ulcers, pressure sores, or decubitus ulcers—are localized injuries to the skin and/or underlying tissues that occur primarily over bony prominences. They result from prolonged pressure, friction, shear forces, and other contributing factors that impair blood flow to the affected area. The National Quality Forum (NQF) classifies pressure ulcers as “never events,” meaning they are largely preventable injuries that indicate a serious breakdown in care.

According to the Agency for Healthcare Research and Quality (AHRQ), more than 2.5 million individuals in the United States develop pressure ulcers annually, and complications related to these wounds claim up to 60,000 lives each year. These figures highlight the critical need for rigorous prevention, early detection, and comprehensive treatment protocols.

Stage 1: Early Skin Changes and Redness

A Stage 1 pressure ulcer involves the epidermis (outermost layer of skin) but does not break it.

• Skin Appearance: Persistent redness or discoloration that does not blanch (turn white) with fingertip pressure. On darker skin tones, it can appear purple, blue, or maroon.
• Temperature and Texture: The area may feel warmer or cooler compared to surrounding skin. It can also be firmer or softer.
• Sensation: Patients may report discomfort, itching, or mild pain. In cases of neuropathy or spinal cord injury, sensation might be diminished.

Clinical Significance:

Stage 1 bedsores can often be reversed with proactive care. According to the Wound, Ostomy and Continence Nurses Society (WOCN), interventions such as scheduled repositioning, pressure-relieving mattresses, and vigilant skin care can typically halt progression at this earliest stage.

Stage 2: Open Sores and Partial-Thickness Skin Loss

A Stage 2 pressure ulcer goes deeper, affecting both the epidermis and part of the dermis (the second layer of skin).

• Skin Appearance: A shallow, open wound with a red or pink wound bed, or a fluid-filled blister that may rupture.
• Tissue Damage: The loss of skin tissue is more pronounced, but bone, tendon, and muscle are not exposed. Necrotic tissue is usually absent at this point.
• Symptoms: Pain, tenderness, and possible clear or light drainage.

Clinical Significance:

Stage 2 ulcers require prompt wound care to prevent further deterioration. Barrier creams, dressings that balance moisture, and continued pressure redistribution are critical. The Journal of the American Medical Directors Association reports that early-stage ulcers can heal within days to weeks if managed correctly, underscoring the importance of timely intervention.

Stage 3: Full-Thickness Tissue Loss Exposing Fat Layers

A Stage 3 ulcer extends through the dermis and into the subcutaneous tissue, exposing underlying fat.

• Wound Depth: The depth varies depending on the individual’s body composition. Adipose (fat) tissue may be visible.
• Appearance: Slough (yellowish or whitish dead tissue) or granulation tissue (healthy, pink tissue) may be present in the wound bed.
• Infection Risk: The chance of infection spikes significantly. Watch for discharge, foul odors, or signs of systemic infection (fever, chills).
• Pain Level: Can be severe unless nerve endings are compromised.

Clinical Significance:

Stage 3 sores may necessitate advanced treatments such as surgical debridement, negative-pressure wound therapy (vacuum-assisted closure), and specialized wound dressings. Collaboration with a multidisciplinary team—including wound care specialists, dietitians, and physical therapists—is often essential for effective treatment and prevention of complications.

Stage 4: Deep Tissue Damage to Muscle, Tendons, and Bone

A Stage 4 pressure ulcer is the most severe category of open bedsore.

• Extent of Damage: Full-thickness tissue loss exposing muscle, tendons, or bone.
• Wound Characteristics: Large amounts of necrotic tissue (eschar), tunneling (sub-wound channels), and drainage may be present.
• Serious Complications: Osteomyelitis (bone infection) and sepsis are frequent and life-threatening concerns.
• Recovery Challenges: Healing typically requires long-term, intensive wound care and can involve reconstructive surgery or skin grafts.

Clinical Significance:

According to the Centers for Medicare & Medicaid Services (CMS), Stage 4 pressure ulcers often signal systemic failures in a care facility’s protocols. Many patients suffer irreversible harm, and some lose their lives to infection. Strict adherence to evidence-based guidelines is imperative for both treating these wounds and preventing them in the first place.

Unstageable Bedsores and Deep Tissue Injuries

• Unstageable: The wound bed is covered by eschar or slough, making it impossible to determine the full extent of tissue loss.
• Deep Tissue Injury (DTI): Characterized by a localized area of deep purple or maroon discoloration that can rapidly evolve into an open wound. DTI indicates significant underlying tissue damage even if the skin surface is not fully broken.

These categories require urgent assessment by healthcare professionals who may remove necrotic tissue to accurately stage the sore and choose an appropriate treatment plan.

Contributing Causes of Bedsores

1. Prolonged Pressure

Unrelieved pressure over bony prominences—such as the sacrum, heels, and hips—restricts blood flow, depriving tissues of oxygen and nutrients. Bedridden or wheelchair-bound individuals are especially prone to this issue.

2. Friction and Shear

Friction occurs when skin repeatedly rubs against a surface, like a mattress or chair. Shear happens when the skin remains in place but deeper tissues shift (for example, sliding down in bed). Both forces damage blood vessels and weaken skin integrity.

3. Excessive Moisture

Incontinence or heavy sweating can create a consistently damp environment. Moist skin is more susceptible to breakdown, allowing bedsores to form more quickly and progress more aggressively.

4. Malnutrition and Dehydration

Insufficient protein, calories, vitamins (notably vitamins C and E), and minerals (like zinc) compromise the skin’s ability to repair itself. Research published in Advances in Wound Care highlights that well-nourished patients heal faster and experience fewer complications.

5. Underlying Medical Conditions

Chronic conditions like diabetes, peripheral vascular disease, or neurological disorders (e.g., spinal cord injuries) reduce circulation, sensation, or mobility, thus raising bedsore risk.

6. Understaffing and Neglect

Short-staffed care facilities may fail to reposition individuals regularly or provide adequate hygiene. A study by the Commonwealth Fund found that understaffing correlates strongly with higher rates of pressure ulcers in long-term care facilities.

Prevention and Early Intervention

• Scheduled Repositioning: Turning or shifting position every two hours in bed, or every 15–30 minutes for wheelchair users, relieves prolonged pressure.
• Pressure-Relieving Devices: Specialized mattresses, cushions, and overlays help distribute weight more evenly.
• Daily Skin Checks: Inspect bony prominences for redness, swelling, or changes in texture at least once per day.
• Proper Nutrition: A diet rich in protein, vitamins, and minerals accelerates wound healing and maintains skin elasticity.
• Moisture Control: Promptly address incontinence and sweating; use barrier ointments and change linens or clothing as soon as they become damp.
• Facility Oversight: Evaluate a care facility’s CMS rating, staffing levels, and track record for compliance with state and federal guidelines.

Conclusion

Bedsores are a preventable but potentially lethal complication of prolonged immobility and inadequate care. By fully understanding the progressive stages—ranging from mild skin irritation (Stage 1) to deep-tissue and bone involvement (Stage 4)—patients, families, and healthcare providers can intervene at the earliest signs of trouble. Proper training, vigilant prevention protocols, and evidence-based treatments are vital to minimizing not only the physical and emotional toll but also the financial burden on patients and the healthcare system.

Whether you are a caregiver seeking best practices or a concerned family member confronting the reality of an advanced bedsore, remaining informed empowers you to advocate for the highest possible standard of care. Careful adherence to guidelines set by authorities like the AHRQ, NPIAP, CMS, and WOCN is key to curbing the incidence and severity of these devastating wounds.

If you believe that your loved one’s bedsores are the result of neglect by a nursing home or caregiver, and would like to understand your rights and options, please contact us for a free consultation.  Our elder abuse and nursing home neglect attorneys are here to answer your questions and help you navigate what can be an extremely devastating time for you and your family.