Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Skin Problems & Treatments Health Center

Font Size

Nail Fungus on the Rise in the U.S.

WebMD Health News

Nov. 17, 2000 -- Think nail fungus is something you'd never have to worry about? New research suggests you should think again. A fungal infection of the fingernails or toenails -- called onychomycosis -- is more prevalent than previously thought and may be on the rise, according to a study in the October issue of the Journal of the American Academy of Dermatology.

A little more than 1,800 people participated in the study that was conducted at 12 locations in Canada and the U.S.

About 14% of the people were found to have nail fungus -- marked by thick, discoloured nails and confirmed through a nail-clipping test.

Previous studies from other countries report rates of nail fungus ranging from about 3% to about 7%. Even though it's hard to tell what the incidence was previously, the high frequency of nail fungus in this study may indicate an increasing incidence in the U.S., according to the researchers.

The study found several factors to be associated with increased risk of nail fungus: older age, male sex, and diseases affecting the circulatory system, including diabetes and high blood pressure.

On the other hand, race, a family history of nail problems or athlete's foot, and participation in various sports or gardening were not associated with an increased risk.

"It's a very common disease, and [14%] may still be an underestimate," says co-author Richard Summerbell, PhD, a senior researcher with a group in the Netherlands that focuses on fungus. At the time of the study, he was with the Ontario Ministry of Health Mycology Laboratory in Canada.

He says it's difficult to look at nail infection in isolation since it's usually linked to foot or skin infection by the same fungus. Plus, there's a genetic component involved. A Florida skin specialist found that about 75% of kids whose parents were susceptible to a certain fungus also were likely to develop the same susceptibility.

These children often become infected in the family home before the age of 7, Summerbell says, and the risk of developing nail fungus increases with each year. "By age 60 or so, the infection tends to work its way up under the ball of the toe and start infecting the nail bed."

Today on WebMD

Pictures and symptoms of the red, scaly rash.
woman with dyed dark hair
What it says about your health.
woman with cleaning products
Top causes of the itch that rashes.
atopic dermatitus
Identify and treat common skin problems.
itchy skin
shingles rash on skin
woman with skin tag
Woman washing face
woman washing her hair in sink
close up of womans bare neck
woman with face cream