About this condition
Fungal skin infections can affect the body, feet, groin and skin folds. Dermatophytes are one group of fungi responsible, but eczema, dermatitis and psoriasis can look similar.
What to know
A classic lesion may be a gradually enlarging round patch with scale and an active border. Not all infections are ring-shaped: between toes there may be peeling and cracks, while skin folds may be itchy and irritated.
Symptoms and reasons for assessment
Possible signs are flaky or scaly areas, itching, redness, cracks between toes or recurring patches on the body or folds. Appearance and severity vary, especially if steroid-containing creams were used beforehand.
Other possible causes
A ring-like rash does not automatically confirm a fungal infection; an inflamed dermatitis patch or another disease may be the cause. Nail fungal infection is a related but different diagnostic problem with a separate approach.
How clinicians assess the problem
The clinician examines the skin and asks about animals, shared items, moisture, previous therapy and repeat episodes. When the diagnosis is unclear or systemic treatment is considered, skin scraping or another laboratory test may be appropriate. Availability of a particular test should be confirmed with the clinic.
Treatment and follow-up options
Treatment depends on site, extent and likely organism and may include prescribed topical or other antifungal medicines. Do not self-treat a suspected fungal rash with steroid combination creams, which may mask and worsen it. Keep affected areas dry and follow the agreed course.
When urgent care is necessary
Rapid spread with severe pain, fever, signs of bacterial infection or marked illness warrants prompt medical assessment; patients with impaired immunity should not delay. Call 103 for serious emergencies.
Related health information
Psoriasis; Onychomycosis (fungal nail infection); Dermatitis.
Signs and symptoms
Diagnosis and tests
Care and treatment approaches
When to seek urgent care
Frequently asked questions
Are fungal rashes always ring-shaped?
No. Classic ring-like patches are common in some forms, while infection between the toes or in folds can look different.
Why might a dermatologist request a skin scraping?
A laboratory sample can help confirm fungal infection when its appearance resembles other skin conditions.
Can I use a steroid cream on a rash that might be fungal?
Avoid self-prescribing it: steroid creams may alter the appearance or worsen some fungal infections.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
