Nail fungus is a common condition that begins as a white or yellow spot under the tip of your fingernail or toenail. As the fungal infection goes deeper, nail fungus may cause your nail to discolor, thicken and crumble at the edge. It can affect several nails.
If your condition is mild and not bothering you, you may not need treatment. If your nail fungus is painful and has caused thickened nails, self-care steps and medications may help. But even if treatment is successful, nail fungus often comes back.
Nail fungus is also called onychomycosis (on-ih-koh-my-KOH-sis). When fungus infects the areas between your toes and the skin of your feet, it's called athlete's foot (tinea pedis).
July 26, 2017
- Onychomycosis. Merck Manual Professional Version. https://www.merckmanuals.com/professional/dermatologic-disorders/nail-disorders/onychomycosis. Accessed May 15, 2017.
- Goldstein AO, et al. Onychomycosis: Management. https://www.uptodate.com/contents/search. Accessed May 15, 2017.
- Toenail fungus. American Podiatric Medical Association. http://www.apma.org/Learn/FootHealth.cfm?ItemNumber=1523. Accessed May 15, 2017.
- Varade RS, et al. Cutaneous fungal infections in the elderly. Clinics in Geriatric Medicine. 2013;29:461.
- Gupta AK, et al. Improved efficacy in onychomycosis therapy. Clinics in Dermatology. 2013;31:555.
- Westerberg DP, et al. Onychomycosis: Current trends in diagnosis and treatment. American Family Physician. 2013;88:762.
- AskMayoExpert. Fungal nail infection (onychomycosis). Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2017.
- Nail care. Natural Medicines. https://naturalmedicines.therapeuticresearch.com/databases/medical-conditions/n/nail-care.aspx. Accessed May 17, 2017.
- Gibson LE (expert opinion). Mayo Clinic, Rochester, Minn. June 6, 2017.