How Can I Get Rid of Fungus on My Nails?

Reviewed on 7/2/2022

A doctor performing a laser treatment on a person's toenail fungus
Treatment to get rid of fungus on the nails may include over-the-counter (OTC) topical antifungal products, foot powder or talcum powder, prescription oral antifungals, and other therapies.

Skin fungal infections are skin diseases caused by fungus, such as mold or mildew. The most common types of fungus that affect the nails include:

Treatment to get rid of fungus on the nails includes:

  • Over-the-counter (OTC) topical antifungal products for mild cases affecting less than 50% of one or two nails for onychomycosis
  • OTC topical antifungal products to kill athlete’s foot fungus
  • Chronic tinea pedis may require adjunctive therapy such as foot powder or talcum powder to prevent skin softening
  • Chronic or extensive fungus on the nails may require prescription oral antifungals 
  • Non-drug treatments

What Are Symptoms of Fungus on the Nails?

Fungal infections of the fingernails and toenails may also affect the skin. 

Symptoms of fungal infections of the nails may include:

  • Ring-shaped rash
  • Skin redness
  • Scaly, cracked skin
  • Skin swelling
  • Itching
  • Blisters
  • Deep fungal infections
  • Red, swollen, peeling, itchy skin between the toes 
  • Soles, heels, and toenails may also be affected
  • Skin on the feet may blister in severe cases

What Causes Fungus on the Nails?

Onychomycosis may be caused by:

  • Dermatophytes such as Trichophyton rubrum (T. rubrum), T. interdigitale (tinea unguium)
  • Yeasts such as Candida albicans and rarely, non-albicans Candida species
  • Molds such as Scopulariopsis brevicaulis and Fusarium species.

Athlete’s foot (tinea pedis) is most often caused by human dermatophytes, a type of fungus transmitted by direct contact with human ringworm sores. Ringworm may also be acquired from the soil or through exposure to animals (commonly household pets).

Risk factors for developing athlete’s foot include:

  • People who have a weakened immune system (such as from HIV/AIDS, cancer, chemotherapy, diabetes, or certain medications)
  • Use of public showers or locker rooms
  • Athletes involved in contact sports, such as wrestling
  • Excessive sweating in tight shoes 
  • Close contact with affected animals such as household pets
  • Working with soil that has ringworm fungus
  • Living in a warm, humid climate
  • Close contact with a person who is infected
  • Sharing bedding, towels, or clothing with a person who is infected

How Is Fungus on the Nails Diagnosed?

Fungal infections of the nails are often diagnosed with a physical examination of the affected skin. 

Tests that may be indicated to diagnose fungus on the nails include:

  • Skin scraping to be examined under a microscope or sent to a laboratory for a fungal culture
  • Ultraviolet light – can only diagnose two species: Microsporum canis and audouinii 

QUESTION

Ringworm is caused by a fungus. See Answer

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Reviewed on 7/2/2022
References
REFERENCES:

Image source: iStock Images

https://www.cdc.gov/fungal/diseases/ringworm/index.html

https://www.uptodate.com/contents/dermatophyte-tinea-infections?search=fungal%20skin%20infection&source=search_result&selectedTitle=1~150&usage_type=default&display_rank=1

https://dermnetnz.org/topics/fungal-skin-infections/