Mayo Clinic Health Manager
Get free personalized health guidance for you and your family.
Get Started
About our e-newsletters
- Free e-newsletters
- Mayo Clinic expertise
- We do not share your e-mail address
Housecall, our weekly general-interest e-newsletter, keeps you up to date on a wide variety of health topics with timely, reliable, practical information, recipes, blogs, questions and answers with Mayo Clinic experts and more. Our biweekly topic-specific e-newsletters also include blogs, questions and answers with Mayo Clinic experts, and other useful information that will help you manage your health.
Housecall Archives
Mayo Clinic Housecall
Stay up to date on the latest health information.
What you get
- Free weekly e-newsletter
- Mayo Clinic expertise
- Recipes, tools and other helpful information
- We do not share your e-mail address
Symptoms
By Mayo Clinic staff
You may have a nail fungal infection — also called onychomycosis (on-i-ko-mi-KO-sis) — if one or more of your nails are:
- Thickened
- Brittle, crumbly or ragged
- Distorted in shape
- Dull, with no luster or shine
- A dark color, caused by debris building up under your nail
Infected nails also may separate from the nail bed, a condition called onycholysis. You may feel pain in your toes or fingertips and detect a slightly foul odor.
When to see a doctor
Once a nail fungal infection begins, it can persist indefinitely if not treated. See your doctor at the first sign of nail fungus, which is often a tiny white or yellow spot under the tip of your nail.
- Onychomycosis. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/sec10/ch125/ch125c.html?qt=nail%20fungus&alt=sh. Accessed June 30, 2009.
- Goldstein A, et al. Onychomycosis. http://www.uptodate.com/home/index.html. Accessed June 30, 2009.
- Nail problems. American Podiatric Medical Association. http://www.apma.org/MainMenu/Foot-Health/FootHealthBrochures/GeneralFootHealthBrochures/NailProblems.aspx. Accessed June 30, 2009.
- Watanabe D, et al. Successful treatment of toenail onychomycosis with photodynamic therapy. Archives of Dermatology. 2008;144:19.
- De Berker D. Fungal nail disease. The New England Journal of Medicine. 2009;360:2108.
- Hinojosa J, et al. Which antifungal is best for toenail onychomycosis? The Journal of Family Practice. 2007;56:581.
