Skin Fungal Infection
A skin fungal infection affects keratinised skin and may be caused by dermatophytes or yeasts. Ring-shaped scale, groin rash, toe-web peeling and pigment patches can have different organisms and treatments.
Key takeaways
- Fungal rashes can resemble eczema, psoriasis, bacterial infection or contact reactions; steroid use may hide and worsen some infections.
- Site matters: scalp, beard, nail and widespread disease often need clinical assessment rather than routine skin cream.
- Topical antifungals can treat selected superficial infections, but adequate application and confirmation of persistent disease matter.
Catalogue matches do not confirm fungus or show that a topical or oral antifungal is suitable.
What patterns suggest fungal disease?
Dermatophyte infection often has an advancing scaly border, while athlete’s foot may crack between toes. Pityriasis versicolor causes pigment change with fine scale. Testing may help when appearance is atypical or treatment fails.
How is treatment selected?
Miconazole treats some superficial fungal and yeast infections, but site, interactions and diagnosis matter. Keeping skin folds dry may reduce recurrence. Oral treatment requires a clinician because liver, pregnancy and interaction risks differ; see skin care.
When to seek urgent care
Seek prompt care for scalp involvement with hair loss, facial or eye involvement, fever, rapidly spreading pain or redness, immune suppression, or a severe treatment reaction.