Dermatomycosis
1 medicine
Dermatomycosis is a fungal infection of the skin, hair, or nails caused by dermatophytes and other fungi. It usually responds to antifungal treatment, topical for mild cases and oral for stubborn nail or scalp infections.
Key facts
- Dermatomycosis is a broad term for fungal infections of the skin, nails, or hair, including ringworm, athlete's foot, and fungal nail infections caused by dermatophytes or other fungi.
- Warm, humid conditions let these fungi thrive, so infections can be persistent without proper treatment.
- Most cases clear with antifungals; widespread skin involvement or stubborn nail infections usually need an oral agent such as itraconazole.
- See a doctor if a patch spreads quickly, doesn't improve after a couple of weeks of treatment, or covers a large area.
What causes it
Dermatophytes are the main culprits, moulds that feed on keratin, the protein that makes up the outer skin layer, hair, and nails. Yeasts such as Candida and Malassezia can also cause dermatomycosis, particularly in skin folds or on the scalp. Risk climbs with sweating, tight or enclosed footwear, shared showers or changing rooms, a weakened immune system, and close contact with an infected person or pet.
How it presents
The appearance depends on the site affected. On the skin, dermatomycosis typically causes ring-shaped, scaly patches with a clearer centre, or diffuse redness in skin folds. Nail infections produce thickened, discoloured, crumbling nails. Scalp involvement causes patchy hair loss with flaking. Itching and mild burning are common across all forms, whatever the site.
Treatment with antifungals
Most dermatomycosis responds to antifungals. Itraconazole is widely used for dermatophyte nail and skin infections, usually given as a short oral course, because topical products alone often can't penetrate a thickened nail plate or deeply keratinised skin. Keeping affected areas clean and dry throughout treatment matters as much as the medicine itself: warmth and trapped moisture help fungi persist and can undo otherwise effective treatment.
When to see a doctor
Get a medical review if a rash or nail change spreads rapidly, causes significant pain, or fails to improve after a couple of weeks of treatment. These signs can point to a more resistant infection or a diagnosis other than simple dermatomycosis.
This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.