Toenail fungus (onychomycosis) is a common nail infection that can cause toenails to become thick, yellow, brittle, cracked, or distorted. Because fungal infections can be difficult to treat and may take months for healthy nail growth to return, prevention is one of the best strategies for maintaining healthy toenails.
Fungus thrives in warm, dark, and moist environments, which makes shoes and socks an ideal place for fungal organisms to grow. Simple daily foot care habits can help reduce your risk of developing toenail fungus or prevent it from returning after treatment.
At Dr. Tong’s Podiatry Clinic, we recommend a proactive approach to foot health by focusing on moisture control, proper nail care, and protecting your feet from fungal exposure.
What Causes Toenail Fungus?
Toenail fungus occurs when fungal organisms invade the toenail or the skin underneath the nail. Fungi can enter through small cracks in the nail, tiny injuries around the toe, or damaged skin.
Common risk factors include:
- Walking barefoot in public showers, pools, and locker rooms
- Sweaty feet
- Wearing tight or non-breathable shoes
- Previous athlete’s foot infection
- Toenail trauma
- Sharing nail tools or footwear
- Aging-related changes in nail growth and circulation
10 Ways to Prevent Toenail Fungus
1. Keep Your Feet Clean and Dry
Fungus grows best in warm, moist environments. Keeping your feet dry is one of the most important steps in preventing fungal toenails.
Daily habits:
✓ Wash your feet regularly
✓ Dry thoroughly after bathing, especially between your toes
✓ Change socks if they become damp from sweat
✓ Allow shoes to completely dry before wearing them again
Moisture-wicking socks and breathable footwear can help reduce sweat buildup.
2. Wear Breathable Shoes
Shoes that trap heat and moisture create an environment where fungus can thrive.
Choose:
✓ Mesh or breathable athletic shoes
✓ Shoes with adequate toe room
✓ Moisture-wicking socks
✓ Footwear that allows airflow
Avoid wearing the same pair of damp shoes every day. Rotating shoes gives them time to dry completely.
3. Wear Shower Shoes in Public Areas
Fungal organisms can spread in warm, wet environments such as:
- Gym locker rooms
- Public showers
- Swimming pool decks
- Spas
- Saunas
Wear flip-flops or shower sandals to create a barrier between your feet and contaminated surfaces.
4. Practice Proper Toenail Care
Improper nail trimming can create small injuries that allow fungus to enter.
Healthy toenail habits include:
✓ Trim toenails straight across
✓ Avoid cutting nails too short
✓ Do not pick or tear nails
✓ Avoid aggressive scraping under the nail
✓ Smooth sharp edges with a clean file
A damaged nail can create an opening where fungal organisms can enter.
5. Disinfect Your Nail Tools
Toenail clippers, files, and grooming tools can carry fungal organisms.
To reduce your risk:
- Clean nail tools after each use
- Do not share nail clippers with others
- Consider having separate tools for infected and healthy nails
Proper nail tool hygiene helps prevent spreading infection between nails or between family members.
6. Treat Athlete’s Foot Early
Athlete’s foot (tinea pedis) is a fungal infection of the skin that can spread to the toenails.
Signs of athlete’s foot include:
- Peeling skin between toes
- Itching or burning
- Redness
- Cracked skin
Treating athlete’s foot early may help prevent the fungus from reaching your toenails.
7. Choose Nail Salons Carefully
Pedicures can be relaxing, but improper sanitation practices may increase the risk of fungal infections.
Before getting a pedicure:
✓ Choose a licensed salon
✓ Confirm tools are properly sterilized
✓ Avoid salons with poor hygiene practices
✓ Consider bringing your own nail tools
Foot baths and instruments should be cleaned appropriately between clients.
8. Avoid Sharing Shoes, Socks, or Towels
Toenail fungus can spread through contaminated personal items.
Avoid sharing:
- Shoes
- Socks
- Towels
- Nail clippers
- Pedicure tools
If someone in your household has fungal nails or athlete’s foot, encourage treatment and avoid sharing items that contact the feet.
9. Protect Your Toenails From Injury
Repeated pressure or trauma can increase the risk of fungal infection.
Common sources of toenail injury include:
- Shoes that are too tight
- Repetitive impact from sports
- Dropping objects on toes
- Improper nail trimming
Wear properly fitted shoes with enough room for your toes to move comfortably.
10. Inspect Your Toenails Regularly
Early detection can make toenail fungus easier to manage.
Watch for:
- Yellow or white discoloration
- Nail thickening
- Crumbling edges
- Nail separation from the nail bed
- Changes in nail shape
If you notice changes, schedule an evaluation with a podiatrist. Not all abnormal toenails are caused by fungus—conditions such as trauma or psoriasis can look similar.
How to Prevent Toenail Fungus From Coming Back After Treatment
Even after successful treatment, toenail fungus can return if the original source of exposure is not addressed.
To reduce recurrence:
✓ Continue keeping feet dry
✓ Disinfect or replace old footwear when appropriate
✓ Treat athlete’s foot promptly
✓ Maintain clean nail tools
✓ Wear protective footwear in public wet areas
✓ Continue regular foot inspections
Prevention is especially important because toenails grow slowly, and a recurrence may take months to become noticeable.
Can Nail Polish Increase the Risk of Toenail Fungus?
Covering abnormal toenails with polish may hide early signs of infection. In some cases, polish or artificial nails may trap moisture against the nail surface.
If you suspect toenail fungus, it is best to have the nail evaluated before covering it with polish.
When Should You See a Podiatrist for Toenail Fungus?
Consider scheduling an evaluation if you notice:
- Persistent yellow or thick toenails
- Pain from thickened nails
- Difficulty trimming your nails
- Toenails becoming brittle or crumbly
- Fungus that keeps returning despite prevention efforts
A podiatrist can determine whether the nail changes are caused by fungus and discuss treatment options.
Toenail Fungus Prevention and Treatment in Marin County
Healthy toenails start with good prevention habits. However, if you develop persistent fungal toenails, early evaluation can help prevent the condition from worsening.
At Dr. Tong’s Podiatry clinic, patients receive a comprehensive foot and nail evaluation with personalized recommendations for preventing and treating toenail fungus, including advanced options such as ToeFX® photodisinfection therapy.
Schedule a consultation to learn how to protect your toenails and maintain healthier feet.
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