In toenail fungus, the
nail becomes thick and yellow and may show white spots and streaks. The condition, also called onychomycosis,
becomes more common as you get older.
It is also somewhat tricky to treat successfully.
How common is toenail
fungus?
Toenail fungus is very
common, especially as people get older. Medical experts estimate that
onychomycosis affects 1 in 10 people overall. That number jumps to 1 in 2 (50%)
for people older than 70.
What causes toenail fungus?
More than one type of
fungi can affect the toenails. Dermatophytes (a type of mold) cause most
toenail fungal infections.
Dermatophytes are
fungal microorganisms (too tiny to see with the naked eye). They feed off of
keratin, a protein found in your fingernails and toenails. Keratin makes nails
hard.
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Is toenail fungus contagious?
Yes, many types of
toenail fungi are quite contagious. An infected person can spread the fungus to
someone else through direct contact. You can also get toenail fungus by
touching an infected surface.
What are common ways you can get toenail fungus?
Nail fungi like warm,
moist, dark places. Many people get toenail fungus by:
- Walking around
the perimeters of swimming pools.
- Using a
public locker room or shower.
- Walking
barefoot in a public area.
Can toenail fungus spread to other areas of the body?
Yes. But toenail
fungus usually doesn’t spread beyond the toe.
Some dermatophyte
fungi spread easily to the skin. (Your skin and scalp also contain keratin.)
When dermatophyte fungi affect the skin, it’s called ringworm.
Toenail fungus may
spread to:
- Other
toenails.
- Skin
between your toes (called athlete’s
foot).
- Groin area
(called jock itch).
- Scalp (skin
on top of your head).
Who is likely to get toenail fungus?
Anyone can get toenail
fungus. It often affects older adults, especially people over 60.
You may have a higher
risk of getting toenail fungus if you have:
- Athlete’s
foot.
- Diabetes.
- Hyperhidrosis (disorder that makes you sweat
a lot).
- Nail
injury.
- Poor blood
circulation due to peripheral
vascular disease.
- Psoriasis.
- Weakened
immune system, such as from an autoimmune disorder or HIV.
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How is toenail fungus diagnosed?
Your healthcare
provider will first look closely at the affected toenail to evaluate your
symptoms. Many providers can identify toenail fungus simply by looking at an
infected toe. However, tests need to be done to confirm the fungal infection.
What tests might I have for toenail fungus?
Your provider will
probably take a small sample from underneath your nail to further analyze it.
Viewing the cells under a microscope can confirm a toenail fungus diagnosis. If
the initial test is negative, a scraping can be sent to see if the fungus grows
out in a culture. It also helps your provider identify the type of fungus.
How is toenail fungus treated?
Toenail fungus is
notoriously tricky to treat. You may need to treat the condition for several
months to get rid of the fungus. Still, toenail fungus often comes back.
A dermatologist (skin
specialist) or podiatrist (foot doctor) can explain your treatment options. If
you have a mild case that doesn’t bother you, your provider may recommend no
treatment.
Toenail fungus
treatment options include:
- Oral
antifungal medication: You
take prescribed medication, such terbinafine (Lamisil®), itraconazole
(Sporanox®) and fluconazole (Diflucan®), to treat the fungi. You will need
to take this medication every day for several months (or longer). Your
provider may use blood tests to check for potential medication side
effects. These medications can affect the liver and interact with other
medications, so oral antifungals are not for everyone.
- Topical
medication: You
regularly apply a medication right on the nail. The medication treats the
fungi over time. Topical medications are most effective when paired with
oral medications.
- Laser
treatments: Your
provider directs a high-tech laser beam and special lights at the toenail
to treat the fungus. Lasers are FDA approved for “temporary increase of
clear nail” in nail fungus but is not a cure. Cure rates for laser
treatment are lower than oral and topical mediations so they are not
typically used as first-line treatments for nail fungus.
What is the most effective treatment for toenail fungus?
The most effective
toenail fungus treatment for you will largely depend on your symptoms and
situation. Your provider will consider several factors before recommending a
treatment plan that’s customized to you.
Overall, oral
antifungal medications may offer the most treatment potential. Pairing oral
drugs with topical antifungal medication may make treatment more effective.
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