Fungal Rash Around the Stoma

A fungal rash around the stoma — medically termed peristomal candidiasis — is one of the most common peristomal skin complications encountered by people living with a colostomy, ileostomy, or urostomy. Although it can cause significant discomfort and worry, it is well understood, generally straightforward to diagnose, and responds reliably to targeted treatment. Understanding why it occurs and how to manage it can help prevent recurring episodes and protect the peristomal skin in the long term.

What Causes a Fungal Rash Around the Stoma?

The vast majority of fungal peristomal rashes are caused by Candida albicans, a yeast that lives harmlessly on skin and mucous membranes in small numbers. Under a stoma appliance, conditions change: warmth, humidity, and limited airflow create an environment in which Candida can proliferate rapidly.

Common Contributing Factors

• Moisture accumulation — Perspiration, output leakage under the baseplate, or condensation can soften (macerate) the skin, breaking down its natural barrier and allowing yeast to invade.
• Antibiotic therapy — Broad-spectrum antibiotics disturb the balance of skin flora, removing bacteria that normally compete with Candida and giving the yeast an advantage.
• Corticosteroids and immunosuppressants — These reduce the skin’s immune defences and are commonly used by people with inflammatory bowel disease who have also undergone stoma formation.
• Diabetes mellitus — Elevated blood glucose provides additional nutrition for yeast and impairs local immune responses.
• Skin trauma — Frequent appliance changes, aggressive adhesive removal, or folliculitis (inflammation of hair follicles under the baseplate) all compromise the skin barrier.

Recognising the Signs

Early recognition is important because a fungal rash can deteriorate quickly and interfere with appliance adhesion, potentially triggering further output leakage and worsening the problem.

Characteristic Features

• Bright-red, well-demarcated erythema immediately surrounding the stoma, often extending to or beyond the edge of the baseplate
• Satellite lesions — Small, discrete red papules or pustules appearing beyond the main rash border; this feature is highly characteristic of candidal infection
• Itching, burning, or soreness, sometimes described as an intense itch that worsens when the skin is moist
• Moist or weeping surface in more advanced cases; the skin may look glazed or superficially eroded
• Irregular, scalloped edge, in contrast to the more geometric border of an allergic contact reaction

If there is any doubt about the diagnosis, a stoma care nurse or clinician can take a simple skin swab for microscopy and culture to confirm the presence of Candida.

Treatment

Treatment aims to eliminate the fungal overgrowth, restore the skin barrier, and maintain a reliable appliance seal throughout recovery.

Antifungal Agents

The first-line treatment for peristomal candidiasis is a topical antifungal applied directly to the affected skin before each appliance change. Antifungal powder (typically containing nystatin or an imidazole such as clotrimazole or miconazole) is preferred over creams or ointments in the peristomal area because it does not compromise appliance adhesion in the way that greasy formulations can.

The standard application technique is:

1. Cleanse the peristomal skin gently with plain water and pat dry thoroughly.
2. Apply a thin, even dusting of antifungal powder to the affected area.
3. Remove all excess powder by lightly brushing with a dry soft gauze.
4. Seal the powder with a thin application of a no-sting barrier film or protective wipe and allow it to dry completely.
5. Apply the appliance as usual.

In more severe or persistent cases, a clinician may prescribe a combined antifungal and mild corticosteroid preparation to address both the infection and associated inflammation, or an oral antifungal such as fluconazole.

Appliance Management Adjustments

Addressing moisture is as important as the antifungal itself. Useful strategies include:

• Increasing the frequency of appliance changes temporarily to reduce moisture build-up and allow skin inspection
• Reviewing the baseplate cut size — a gap between the stoma and the barrier’s inner edge exposes skin to output and moisture
• Using a convex appliance or belt if the stoma is flush or retracted, which may contribute to leakage
• Considering a two-piece system that allows the pouch to be changed without disturbing the baseplate, reducing adhesive trauma while the skin heals

Prevention

Once the acute episode has resolved, several measures reduce the likelihood of recurrence:

• Maintain meticulous peristomal skin hygiene — warm water and gentle drying are sufficient; soap residue can disrupt skin pH.
• Change the appliance according to the manufacturer’s recommended schedule and before any leakage occurs.
• Manage systemic risk factors where possible: optimal glycaemic control in diabetes, appropriate probiotic use during antibiotic courses (discuss with your clinician), and careful moisture management in warm weather.
• Inspect the peristomal skin at every appliance change and report changes early.
• People on long-term immunosuppression or corticosteroids may benefit from a prophylactic antifungal powder dusting, in discussion with their stoma care team.

When to Seek Further Help

Consult your stoma care nurse or GP promptly if:

• The rash does not begin to improve within one week of treatment
• The skin becomes broken, bleeding, or deeply eroded
• You develop fever, spreading redness, or swelling beyond the peristomal area
• The rash recurs repeatedly, which may indicate an underlying systemic condition requiring investigation

Always consult your stoma care nurse or clinician before starting or changing any treatment for peristomal skin problems.

The Bottom Line

Fungal rashes around the stoma are common, recognisable, and treatable. The hallmark satellite lesions help distinguish candidal infection from other peristomal skin problems, and antifungal powder — used correctly under the appliance — is an effective first-line response. Addressing the underlying moisture and skin-barrier issues alongside the antifungal treatment gives the best chance of rapid healing and prevents recurrence. Regular skin assessment and an open dialogue with your stoma care team are the cornerstones of healthy peristomal skin in the long term.