Sacral Pressure Ulcer Prevention: How to Protect the Skin and Reduce Risk

A sacral pressure ulcer can develop when prolonged pressure reduces blood flow to the skin and underlying tissue around the sacrum, or tailbone. This area is particularly vulnerable in people who spend long periods sitting or lying down, especially when limited mobility, moisture, friction, poor nutrition, or underlying health conditions make the skin more susceptible to damage.

Also known as a pressure injury, pressure sore, or bedsore, this type of wound can become painful and difficult to heal once tissue breakdown occurs.

That’s why pressure ulcer prevention is so important. Regular repositioning, good skin care, appropriate support surfaces, proper nutrition, and sacral dressings to prevent pressure ulcers can all be part of a comprehensive prevention plan for people at increased risk.

What Is a Sacral Pressure Ulcer?

The sacrum is the triangular bone at the base of the spine, just above the tailbone. Because there is relatively little padding between the bone and skin, pressure can become concentrated in this area when someone remains in the same position for an extended period.

A sacral pressure ulcer develops when pressure, sometimes pressure combined with friction or shear, damages the skin and underlying tissue.

Imagine squeezing a garden hose. When enough pressure is applied, water can no longer move freely through it. Something similar can happen to tiny blood vessels when body tissue is compressed between a bony area and a mattress or chair. Reduced circulation means the tissue receives less oxygen and nutrients.

The damage may begin beneath the surface before an obvious open wound appears. That makes early prevention and regular skin inspection especially important.

Who Is Most at Risk for a Sacral Ulcer?

Anyone can develop a pressure injury under certain circumstances, but certain factors make a sacral ulcer more likely.

Limited mobility is one of the biggest risks. Someone who cannot independently turn in bed, shift their weight in a wheelchair, or walk regularly may experience prolonged pressure over the same area.

Risk can also increase with advanced age, poor nutrition or inadequate protein intake, incontinence, excessive skin moisture, decreased sensation, poor circulation, serious illness, and medical conditions that interfere with mobility or healing.

Older adults may be particularly vulnerable because aging skin generally becomes thinner, less elastic, and more fragile. A person who cannot feel discomfort normally may also fail to recognize the body’s natural signal to change positions.

For caregivers, recognizing these risks before a bedsore appears is one of the most important parts of prevention.

Reposition Frequently to Reduce Pressure

One of the foundations of sacral pressure ulcer prevention is relieving pressure before prolonged compression damages tissue.

For someone who can move independently, this may mean getting up for a short walk, changing seated positions, adjusting the recline of a chair, or regularly shifting body weight.

For someone with limited mobility, caregivers may need to help with repositioning in bed or in a chair. Side-lying positions and positioning aids such as wedges can help redistribute pressure away from the sacrum.

Research has shown that 30 degrees of wheelchair tilt can help to reduce pressure in the ischial, buttocks, and sacral areas. Positioning should still be individualized, however, because there is no single schedule or position that is appropriate for every person.

A healthcare professional can help determine an appropriate repositioning plan based on mobility, skin condition, medical status, support surface, and individual risk.

Keep the Sacral Area Clean and Dry

Pressure isn’t the only threat to vulnerable skin.

The sacral area is frequently exposed to perspiration and, for people with incontinence, urine or stool. Too much moisture can soften the skin, a process known as maceration, and make it more vulnerable to friction and breakdown.

Skin should be gently cleaned following episodes of incontinence and dried without aggressive rubbing.

A moisture barrier may also be recommended to help protect the skin from prolonged exposure to urine, stool, or excess moisture.

At the same time, excessively dry skin can crack and become fragile, so appropriate moisturizing is also important.

Moisture-associated skin damage and a sacral pressure ulcer are not the same thing, although they can occur together.

If you’re unsure what is causing redness, irritation, or skin breakdown around the buttocks or sacral area, a healthcare professional can evaluate the skin and recommend appropriate care.

Check the Skin Regularly for Early Signs of a Bedsore

A bedsore doesn’t always begin as an open wound. Changes in the skin may appear first, which is why daily inspection is so valuable for people at risk.

Pay attention to persistent redness or discoloration, particularly an area that does not lighten when pressure is removed. Other warning signs can include unusual warmth or coolness, tenderness, pain, swelling, or an area that feels noticeably firmer or softer than the surrounding skin.

On darker skin tones, early pressure damage may appear purple, blue, or darker than the surrounding skin rather than bright red.

A mirror can make it easier to inspect the sacrum if the person is able to perform the check independently. Caregivers can also incorporate skin inspection into bathing, dressing, or repositioning routines.

If you notice persistent discoloration, an open wound, blistering, drainage, or rapidly changing skin, contact a healthcare professional.

Use Pressure-Redistributing Cushions and Support Surfaces

A standard mattress or chair may not provide enough pressure redistribution for someone at high risk.

Specialized foam mattresses, pressure-redistributing mattresses, wheelchair cushions, and other support surfaces can help spread body weight across a larger area instead of concentrating it over the sacrum.

These products do not eliminate the need for movement and repositioning. Instead, they work as another layer of a broader sacral pressure ulcer prevention strategy.

Pillows and positioning wedges can also be useful for maintaining a safer position and reducing direct pressure over vulnerable areas when used appropriately.

Avoid adding unnecessary layers of sheets, pads, or other materials between the person and the support surface.

Extra layers can change how pressure is distributed and may increase friction or bunch underneath the body.

Sacral Pressure Ulcer Prevention with Sacral Dressings

Research increasingly supports the use of prophylactic sacral foam dressings as an additional prevention strategy for people at increased risk of pressure injuries.

Sacral dressings to prevent pressure ulcers are specially shaped to fit over the sacrum. Unlike a standard rectangular bandage, their shape helps provide coverage around the contours of the lower back and buttocks.

Multilayer silicone foam dressings can provide cushioning, help manage moisture, and reduce some of the friction and shear affecting vulnerable skin.

BODYARMOR Medical’s silicone foam sacral dressings have a gentle silicone adhesive border, protective foam layer, absorbent layer, and waterproof outer film. The dressings are shaped specifically for the sacral area and can be gently lifted and repositioned during skin checks.

Importantly, these dressings are not a replacement for repositioning, skin care, nutrition, or an appropriate support surface. They are intended to be used as one component of a comprehensive prevention strategy.

Research continues to support their use, particularly in high-risk populations such as critically ill patients.

Shop Body Armor Medical Silicone Foam Sacral Dressings

Don’t Overlook Nutrition and Hydration

Skin needs adequate nutrition to maintain its strength and repair everyday damage.

Protein is particularly important because the body uses amino acids to maintain and rebuild tissue. Adequate calories, fluids, vitamins, and minerals also contribute to skin health and the body’s ability to recover.

Poor appetite, unintentional weight loss, difficulty eating, or inadequate fluid intake can become important concerns for someone already at risk for a sacral ulcer.

Nutritional needs vary considerably depending on age, medical conditions, activity level, and whether a wound is already present.

A physician or registered dietitian can help identify deficiencies and determine whether additional calories, protein, or nutritional support may be appropriate.

Preventing a Sacral Pressure Ulcer Requires More Than One Strategy

There isn’t one product, position, or routine that can completely eliminate the risk of pressure injuries.

Effective pressure ulcer prevention combines multiple strategies: relieve pressure regularly, protect skin from excess moisture, inspect vulnerable areas, use appropriate support surfaces, maintain adequate nutrition, and consider preventive dressings when appropriate.

For someone with limited mobility or several risk factors, prevention should begin before the skin breaks down, not after a bedsore appears.

Once a sacral pressure ulcer develops, treatment depends on factors such as the depth of tissue damage, drainage, infection risk, surrounding skin condition, and the person’s overall health.

An existing wound should be evaluated by an appropriate healthcare professional rather than relying solely on preventive measures.

Frequently Asked Questions About Sacral Pressure Ulcers

Preventing pressure injuries is easier when you know what to watch for and how to protect vulnerable skin. These common questions can help caregivers and people at risk better understand sacral pressure injuries and when additional care may be needed.

What does a sacral pressure ulcer look like when it first starts?

An early sacral pressure ulcer may appear as persistent redness or discoloration over the tailbone area that doesn’t return to its normal color after pressure is removed. The area may also feel warmer, cooler, firmer, softer, or more tender than nearby skin, and early changes can look different on darker skin tones.

How do you prevent a bedsore on the tailbone?

Reducing prolonged pressure is one of the most important steps to prevent sacral pressure ulcers. A comprehensive approach may include frequent position changes, pressure-redistributing mattresses or cushions, moisture management, daily skin checks, adequate nutrition, and prophylactic sacral foam dressings for people at increased risk.

Do sacral dressings prevent pressure ulcers?

Research suggests prophylactic silicone foam sacral dressings can reduce pressure injury incidence when used in addition to standard preventive care. Sacral dressings to prevent pressure ulcers should complement, not replace, repositioning, skin assessment, moisture management, nutrition, and pressure redistribution.

How often should someone be repositioned to prevent a sacral ulcer?

There isn’t one repositioning schedule that is appropriate for everyone. Frequency should be individualized according to the person’s mobility, skin condition, health status, comfort, support surface, and overall pressure injury risk, ideally with guidance from a healthcare professional.