Treating Peristomal Moisture-Associated Skin Damage

Peristomal moisture-associated skin damage (MASD) is one of the most common complications experienced by people living with a colostomy, ileostomy, or urostomy. It occurs when the skin surrounding the stoma is exposed to prolonged or repeated contact with effluent, urine, perspiration, or wound exudate — substances that erode the skin’s natural protective barrier. Although rarely dangerous in its early stages, MASD causes significant discomfort, undermines appliance adhesion, and, if left unmanaged, can escalate into deeper skin breakdown or secondary infection.

Understanding the Mechanism of Damage

Healthy peristomal skin acts as a physical and chemical barrier. Prolonged moisture exposure causes maceration — a softening and whitening of the outer skin layers — which reduces tensile strength and makes the tissue vulnerable to friction, shear, and chemical attack. Ileostomy output is particularly corrosive because it contains active digestive enzymes; urostomy urine is damaging due to its acidity and ammonia content. Even colostomy effluent, though less enzymatic, can cause damage when leakage is sustained.

Distinguishing MASD from Other Peristomal Skin Conditions

Accurate diagnosis guides correct treatment. MASD typically presents as:

• Erythema (redness) mirroring the shape of the leaking area, with or without superficial skin loss
• Maceration — pale, waterlogged-looking skin, sometimes with a wrinkled or soggy texture
• Erosions — shallow, moist, painful breaks in the skin surface
• A pattern that corresponds to the distribution of moisture (often under the baseplate edge or at a fold)

By contrast, allergic contact dermatitis tends to produce a rash precisely mirroring the adhesive footprint, while peristomal pyoderma gangrenosum presents with ragged, painful ulcers and may be associated with inflammatory bowel disease. Candidal infection, which can complicate MASD, adds satellite lesions and intense pruritis to the picture. If you are uncertain about the diagnosis, consult your stoma care nurse or clinician before initiating treatment.

Identifying the Underlying Cause

Effective treatment begins by understanding why leakage is occurring. Common causes include:

• Poor appliance fit — a baseplate aperture that is too large leaves peristomal skin exposed to effluent
• Stoma retraction or prolapse — altered stoma height or shape changes how output is directed
• Peristomal contour changes — weight fluctuation, pregnancy, or post-surgical changes create folds and creases that disrupt the appliance seal
• Incorrect wear time — leaving a baseplate on beyond its functional life allows effluent to migrate under the adhesive
• High-output stomas — particularly high-output ileostomies may overwhelm a standard pouch capacity

A thorough assessment by a stoma care nurse will usually identify the causative factor. Correcting the underlying problem is as important as treating the skin itself.

Principles of Treatment

Skin Cleansing

Clean the peristomal skin gently with warm water and a soft cloth or gauze. Avoid soap unless specifically formulated for peristomal use, as residues impair adhesion and some soaps are alkaline and disruptive to skin pH. Pat — do not rub — the skin dry before applying any product or replacing the appliance.

Skin Barriers and Protective Films

A cornerstone of MASD management is the application of an appropriate skin barrier product to protect damaged skin from further moisture exposure and chemical attack. Clinically validated options include:

• Barrier films (no-sting, alcohol-free formulations) — create a transparent protective layer and are generally compatible with appliance adhesion
• Barrier creams and pastes — offer thicker protection for more significantly eroded skin; some formulations are designed to be used beneath adhesive baseplates
• Hydrocolloidal and absorbent powders — can absorb small amounts of moisture and assist re-epithelialisation of superficial erosions

All products used should be specifically formulated for peristomal use. Applying barrier products in a thin, even layer and allowing them to fully dry before fitting the appliance maximises their effectiveness.

Appliance Selection and Adjustment

For many people with MASD, switching to a different baseplate profile resolves leakage and allows healing to proceed. Options to discuss with your stoma care nurse include:

• Convex baseplates — useful when the stoma sits flush with or below the skin surface
• Mouldable or soft-flex baseplates — conform better to irregular skin contours
• Two-piece systems — allow skin inspection and product application without disturbing the adhesive wafer on every change
• Absorbent pouch covers or belts — reduce mechanical stress on the peristomal seal

Never cut a baseplate aperture significantly larger than the stoma to avoid fitting difficulties; a correctly measured fit should leave no more than 1–3 mm of clearance.

Managing Secondary Infection

If a candidal (fungal) infection is confirmed or strongly suspected, an antifungal agent is required. Antifungal powder formulations are generally preferred over creams in the peristomal setting, as creams can compromise adhesion. A short course of topical antifungal powder, applied to the skin and sealed with a barrier film, is a widely used approach. Bacterial secondary infection is less common but warrants microbiological assessment and, where indicated, systemic antibiotic therapy under medical supervision.

Frequency of Appliance Change During Healing

During active MASD, more frequent appliance changes may be necessary to allow barrier product application and wound assessment. However, excessively frequent changes cause mechanical trauma — particularly harmful to already-fragile skin — so frequency should be tailored by a clinician. The goal is to restore normal wear time as quickly as the underlying cause is addressed.

Monitoring Healing Progress

Healed peristomal skin should return to its normal colour, texture, and integrity over one to three weeks with optimal management, though deeper erosions may take longer. Progress can be tracked by:

• Photographic documentation at each appliance change
• Pain scoring — reduction in discomfort is an early sign of improvement
• Appliance adhesion time — improving wear time suggests skin surface is recovering

If healing is not progressing within two to three weeks, or if the condition worsens, further assessment is needed to exclude alternative diagnoses or contributing factors such as poorly controlled output volume.

Prevention After Recovery

Once the skin has healed, the priority shifts to preventing recurrence. Key preventive strategies include maintaining a well-fitted appliance, adhering to recommended wear times, performing regular skin checks at every appliance change, and attending periodic review appointments with a stoma care nurse — especially after any significant change in body weight, diet, or stoma output.

The Bottom Line

Peristomal MASD is a common but very manageable complication of stoma care. Success depends on accurate diagnosis, prompt correction of leakage, appropriate use of barrier products, and appliance optimisation. Most people achieve full skin healing within a few weeks when the cause is identified and addressed. Always consult your stoma care nurse or clinician before changing your treatment approach, as what works for one stoma type or individual may not be appropriate for another.