Xeroform petrolatum dressing is a non-stick gauze coated in a petroleum blend that keeps wounds moist while they heal. It’s most commonly sent home with patients after burns, skin grafts, or surgical procedures where the skin needs a protective, moisture-retaining barrier. Using it correctly comes down to a few key steps: keeping the dressing moist, changing it on schedule, trimming it as the wound shrinks, and knowing what warning signs to watch for.
What Xeroform Is Made Of
Xeroform is a fine mesh absorbent gauze covered with a petrolatum blend containing 3% bismuth tribromophenate. The petrolatum does the heavy lifting: it creates a barrier that holds moisture against the wound, prevents the gauze from drying out and sticking to healing tissue, and shields the area from outside contamination. The bismuth compound gives the gauze its distinctive yellowish color and slight medicinal smell.
Interestingly, while bismuth itself has antimicrobial properties in lab settings, a study testing Xeroform against fifteen common wound pathogens found no measurable antimicrobial activity from the dressing. The clinical value of Xeroform appears to come from its role as an occlusive, non-adherent barrier rather than from any germ-killing effect. This is worth knowing because it means Xeroform isn’t a substitute for keeping a wound clean.
How to Apply the Dressing
Before handling Xeroform or touching your wound, wash your hands thoroughly. If your provider gave you wound-cleaning instructions (such as rinsing with saline or gently washing with mild soap and water), do that first and pat the area dry.
Cut the Xeroform to fit the wound. You want the gauze to cover the wound surface with a small margin of overlap onto surrounding skin, but you don’t need to wrap large areas of healthy skin. Use clean scissors wiped down with an alcohol swab. Lay the Xeroform directly onto the wound in a single layer, pressing it gently so it makes full contact with the wound bed. Avoid bunching or folding the gauze, since wrinkles can create pressure points and uneven moisture.
Your provider may instruct you to cover the Xeroform with a secondary dressing, typically a layer of absorbent gauze or a pad, secured with medical tape or a wrap. The secondary dressing absorbs any fluid that seeps through and protects the Xeroform from shifting. The type of outer dressing depends on how much fluid your wound is producing. Follow your provider’s specific directions on whether and how to cover it.
How Often to Change It
Xeroform is usually changed once daily. The goal is to keep it moist enough that it doesn’t dry out and bond to the wound surface. A dried-out Xeroform dressing that sticks to healing tissue can tear new skin when you remove it, which sets back healing and hurts.
If the dressing gets wet from showering or any other source, pat it dry or replace it. As your wound heals, the Xeroform will start to look crusty and may itch. That’s a normal sign that the skin underneath is progressing, and it means the dressing is ready to be changed and trimmed down.
Trimming as the Wound Heals
Wounds don’t stay the same size, and your dressing shouldn’t either. As new skin forms at the edges of the wound, you’ll notice the Xeroform lifting or separating from areas that have closed over. When this happens, use your alcohol-cleaned scissors to trim away the portions covering healed skin, leaving Xeroform only over the remaining open wound.
Once you trim the dressing back, apply a gentle lotion or moisturizing cream to the newly healed areas where you removed the gauze. Fresh skin is fragile and dry, and keeping it moisturized helps prevent cracking and supports continued healing.
Signs That Something Is Wrong
Some mild itching and crustiness at the dressing edges is normal during healing. But certain changes signal a possible infection or complication that needs medical attention:
- Increasing redness, swelling, or warmth in the skin around the wound
- Fluid buildup collecting underneath the Xeroform
- A foul smell coming from the wound (Xeroform itself has a mild medicinal odor, but a strong or worsening smell is different)
- Fever of 100.4°F (38°C) or higher
- Chills, increasing pain, or bleeding from the wound site
Any of these warrant a prompt call to your provider.
Who Should Not Use Xeroform
Xeroform is not suitable for anyone with a known allergy or sensitivity to petroleum products or bismuth tribromophenate. People with a history of atopy (a tendency toward eczema, asthma, or allergic reactions) should use it with caution, as the petrolatum blend may trigger skin irritation. The dressing is also not designed for heavily draining wounds. If a wound is producing a lot of fluid, the petrolatum barrier can trap excess moisture against the skin, which promotes breakdown rather than healing.
Why Xeroform Over Other Options
Xeroform’s main advantage is practical: it sticks to the wound just enough to stay in place without bonding to new tissue the way plain dry gauze does. This makes dressing changes significantly less painful, which matters a lot for burns and skin graft donor sites that already hurt.
A retrospective study of 347 pediatric scald burn patients compared Xeroform to silver sulfadiazine cream, a widely used burn treatment. Both groups had similar burn sizes and similar rates of needing skin grafts. But patients treated with Xeroform who did need grafting required significantly smaller grafts on average (147 vs. 336 square centimeters), suggesting better wound healing in the surrounding tissue. Xeroform patients also had the advantage of being discharged with their dressings in place, avoiding the frequent, uncomfortable dressing changes that silver sulfadiazine requires. For many patients, fewer painful dressing changes is reason enough to prefer it.