Onychomycosis (patient information)
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief:; Assistant Editor(s)-In-Chief:
Overview
Fungal nail infection is an infection of the nails by a fungus.
What are the symptoms of onychomycosis?
Nail changes on one or more nails (usually toenails): Brittleness Change in nail shape Crumbling of the outside edges of the nail Debris trapped under the nail Loosening or lifting up of the nail Loss of luster and shine Thickening of the nail White or yellow streaks on the side of the nail
What causes onychomycosis?
The body normally hosts a variety of bacteria and fungi. Some of these are useful to the body. Others may multiply quickly and form infections. Fungi can live on the dead tissues of the hair, nails, and outer skin layers.
Fungal infections include mold-like fungi that cause:
- Athlete's foot
- Jock itch
- Ringworm on the skin of the body or head
Fungal nail infections are most often seen in adults. They often follow fungal infection of the feet. Toenails are affected more often than fingernails.
People who often go to public swimming pools, gyms, or shower rooms, and people who sweat a great deal, often have mold-like infections. The fungi that cause them thrive in warm, moist areas.
The following increase the risk of a fungal infection:
- Getting manicures and pedicures using utensils that have been used on other people
- Getting minor skin or nail injuries
- Having a nail deformity or nail disease
- Having moist skin for a long time
- Poorly functioning immune system
- Wearing closed-in footwear
Who is at highest risk?
When to seek urgent medical care?
Diagnosis
Treatment options
Diseases with similar symptoms
Where to find medical care for onychomycosis?
Directions to Hospitals Treating Onychomycosis
What to expect (Outlook/Prognosis)?
Possible complications
Prevention
Sources