Fungal Toenail Infections

How can I tell if my 7-year-old son has a fungal toenail infection?

Dr. Greene’s Answer:

Fungal nail infections are more common in kids than most people think. These infections usually start with an athlete’s foot rash around the toes that gets into the nails. The nails become thickened and discolored. Doctors can often tell by simply examining the nails, but sometimes sending a little sample for testing is necessary.

This fungus grows in a warm, moist, dark environment, which is why the inside of shoes is such a great place. Wearing white cotton socks and cool shoes or sandals can help to slow the spread of fungus. You can try some of the over-the-counter athlete’s foot preparations, though Lamisil cream is probably the strongest. When the fungus gets into the nail, oral prescription medications are usually needed. The best ones are Lamisil, Sporanox, or Diflucan. There are older medicines available, but they have more side effects.

Dr. Alan Greene

Dr. Greene is the founder of (cited by the AMA as “the pioneer physician Web site”), a practicing pediatrician, father of four, & author of Raising Baby Green & Feeding Baby Green. He appears frequently in the media including such venues as the The New York Times, the TODAY Show, Good Morning America, & the Dr. Oz Show.

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