The periwound (also written “peri-wound”) is the area of skin surrounding a wound, extending from the wound’s edge outward to about 4 centimeters beyond it. It might seem like ordinary skin, but this zone plays a direct role in how well and how quickly a wound heals. When periwound skin breaks down, healing slows, pain increases, and the risk of infection rises.
Why the Periwound Matters for Healing
New skin cells migrate from the wound’s edges inward toward the center to close a wound. If the periwound skin is damaged, that migration stalls. Healthy periwound tissue also supports the growth of new blood vessels and the specialized cells that pull wound edges together. In chronic wounds like venous leg ulcers, maintaining the integrity of surrounding skin is one of the strongest predictors of whether the wound will close at all.
This is why wound care professionals assess the periwound as part of every evaluation. Standardized tools like the Bates-Jensen Wound Assessment Tool include specific items for the surrounding skin’s color, swelling, and firmness, treating the periwound as just as important as the wound bed itself.
What Clinicians Look for During Assessment
A periwound assessment focuses on several visible and tactile signs:
- Color changes: Redness may signal inflammation or early infection. Pale or bluish skin can indicate poor blood flow, which compromises healing.
- Swelling and firmness: Puffiness (edema) or a hardened feel (induration) around the wound suggests the tissue is inflamed or under stress.
- Moisture level: Skin that looks white, soggy, or wrinkled is macerated from too much moisture. Skin that’s dry and flaky may not be getting enough.
- Skin breakdown: Any raw, peeling, or eroded areas around the wound point to active damage that needs to be addressed before healing can progress.
Maceration: The Most Common Problem
Maceration is the softening and breakdown of periwound skin caused by prolonged exposure to moisture, usually wound fluid (exudate). While a certain amount of moisture helps wounds heal, wound fluid contains enzymes that actively break down intact skin. When the fluid sits on surrounding tissue for too long, it strips away the skin’s protective outer layer, leaving it waterlogged and fragile.
Once this barrier is compromised, the skin becomes more permeable to irritants, triggering inflammation and further breakdown. Wet skin also has a much higher friction coefficient, making it more vulnerable to damage from bandages shifting or rubbing against clothing. The result is a vicious cycle: periwound damage enlarges the wound area, produces more exudate, and causes more maceration.
Maceration is also linked to higher pain levels. Research shows that patients with significant periwound maceration report more pain both before and during dressing changes.
Adhesive Injuries and Contact Dermatitis
Wound dressings and medical tapes can themselves cause periwound damage. Medical adhesive-related skin injury (MARSI) is an umbrella term for problems caused by the adhesives used in wound care, including skin stripping, tension blisters, skin tears, and irritation of hair follicles.
Some people also develop allergic contact dermatitis from adhesive components, a true immune reaction that causes itching, redness, and sometimes blistering in the shape of the tape or dressing. In practice, it can be difficult to tell whether periwound dermatitis is caused by moisture from the wound, the adhesive holding the dressing in place, or a combination of both. The distinction matters because treatment depends on the cause: switching dressings solves an adhesive allergy, while better moisture management solves maceration.
Periwound Infection Signs
The periwound area is often where infection first becomes visible. Cellulitis, a spreading bacterial infection of deeper skin layers, shows up as a warm, tender, poorly defined area of redness that expands outward from the wound. It typically looks pink to red, feels swollen, and is painful to touch. If the redness has very sharp, raised borders instead, that pattern is more consistent with erysipelas, a more superficial infection.
Any area around a wound that feels fluctuant, meaning soft and fluid-filled rather than firm, may indicate an abscess forming beneath the surface. Purulent drainage, increasing warmth, and worsening tenderness are all signals that the periwound tissue is infected rather than simply irritated.
How Dressings Protect the Periwound
Choosing the right dressing is one of the most practical ways to protect periwound skin. The goal is to absorb enough exudate to prevent maceration while keeping the wound moist enough to heal. Different dressings handle this balance differently.
Foam dressings work across a wide range of exudate levels and are a common first choice. Hydrofibre dressings are especially good at wicking fluid vertically, pulling moisture away from the wound surface and locking it into the dressing so it doesn’t spread laterally onto surrounding skin. They can absorb 15 to 25 times their weight in fluid. Alginate dressings, made from seaweed-derived fibers, absorb well but can leak under compression, sometimes requiring a secondary absorbent layer on top. Hydrocolloid dressings are better suited to wounds with light to moderate drainage; on heavier wounds, they can actually contribute to periwound maceration. Polysaccharide bead dressings can absorb up to seven times their weight and are useful for trapping bacteria and debris.
When drainage overwhelms a dressing’s capacity, the excess fluid spills onto periwound skin. Matching the dressing to the actual exudate volume, and changing it before it’s saturated, is key to preventing breakdown.
Skin Barriers and Protectants
Beyond dressing selection, protective barriers can be applied directly to periwound skin to shield it from moisture and irritants. Four main types are used.
Film-forming liquid acrylates are sprayed or wiped onto the skin, where they dry in seconds into a thin, transparent, flexible film. They resist being washed away by wound fluid, allow you to see the skin underneath, and have a low rate of allergic reactions. Some older formulations contain alcohol and can sting on application, though newer versions are designed to avoid this.
Petrolatum creates a simple, inexpensive occlusive layer that blocks moisture. Zinc oxide paste offers a stiffer, more robust version of the same idea, standing up better to heavy moisture and heat. It is harder to remove, though, and old paste can be left in place with fresh product layered on top rather than scrubbed off at every dressing change.
Windowed adhesive dressings take a different approach: a thin hydrocolloid or transparent film is placed around the wound with a cutout over the wound itself, so the periwound skin is physically sealed under a protective layer while a separate dressing covers the wound bed.