Most people notice something unusual about their feet long before they seek medical care. Maybe the skin between the toes has become itchy and cracked, or perhaps a toenail has gradually turned yellow and thick. Because both conditions are caused by fungi, many people assume they are the same problem.
In reality, athlete’s foot and toenail fungus are different infections that affect different parts of the foot and often require different treatments. Fortunately, both are extremely common, and many uncomplicated cases can be evaluated through telehealth using photographs and your medical history.
What Is Athlete’s Foot?
Athlete’s foot, also called tinea pedis, is a fungal infection involving the skin of the feet. It develops when dermatophyte fungi grow in warm, moist environments such as shoes, locker rooms, swimming pool decks, and sweaty socks. It is one of the most common fungal infections worldwide.
Typical symptoms include itching between the toes, a burning sensation, peeling or cracked skin, scaling, redness, dry patches, and small blisters in some patients. The infection most commonly begins between the fourth and fifth toes but may spread across the soles.
What Is Toenail Fungus?
Toenail fungus, also called onychomycosis, affects the nail itself rather than the surrounding skin, and develops slowly over months or years. Common findings include thickened nails, yellow/white/brown discoloration, brittle nails, crumbling edges, and separation of the nail from the nail bed. Unlike athlete’s foot, toenail fungus usually causes little discomfort until the nail becomes significantly thickened.
Athlete’s Foot vs. Toenail Fungus
| Athlete’s Foot | Toenail Fungus |
|---|---|
| Affects skin | Affects nails |
| Very itchy | Usually not itchy |
| Peeling skin, redness | Thick, yellow, brittle nails |
| Cracks between toes | Crumbling nail edges |
| Responds quickly to topical treatment | Often requires oral medication |
Although they are different infections, they often occur together.
Why Do They Develop?
Fungi thrive in warm, damp environments. Risk factors include wearing damp shoes, excessive sweating, public locker rooms, swimming pools, diabetes, poor circulation, older age, and immune suppression. The longer moisture remains trapped inside shoes, the greater the opportunity for fungal growth.
Is It Contagious?
Yes. Fungal infections spread through shared showers, gym floors, towels, shoes, socks, and nail clippers. Walking barefoot in public locker rooms increases exposure.
Treatment for Athlete’s Foot
Most uncomplicated athlete’s foot improves with topical antifungal medications such as terbinafine, clotrimazole, miconazole, or butenafine. Treatment usually continues for one week after symptoms resolve to reduce recurrence. Keeping feet dry is equally important.
Treatment for Toenail Fungus
Toenail fungus is much more difficult to eliminate. Topical medications may help mild infections, but more advanced infections often require prescription oral antifungal medications for several months. Treatment decisions depend on the number of nails involved, severity, liver disease, medication interactions, diabetes, and age. Because oral antifungals carry potential side effects, physician evaluation is important before starting treatment.
Preventing Recurrence
Successful treatment includes preventing reinfection: change socks daily, dry feet thoroughly, wear breathable shoes, alternate shoes between days, wear sandals in locker rooms, disinfect nail clippers, and avoid sharing towels. Patients who continue exposing their feet to moist environments frequently experience recurrent infections.
Can Telehealth Diagnose Foot Fungus?
Yes. Clear photographs often provide enough information for a physician to distinguish athlete’s foot from toenail fungus. During your consultation, your physician will ask when symptoms began, whether itching is present, previous treatments, diabetes history, medication allergies, and other medical conditions. If the diagnosis is uncertain, laboratory testing or referral may be recommended.
Frequently Asked Questions
Can athlete’s foot become toenail fungus?
Yes. The fungi causing athlete’s foot may spread into the toenails if left untreated.
Why won’t my toenail improve?
Toenails grow slowly. Even after successful treatment, normal nail growth may take 12 to 18 months.
Is toenail fungus dangerous?
Usually not. However, patients with diabetes or poor circulation have a greater risk of complications and should seek evaluation.
Can I paint my toenails?
Nail polish may reduce the effectiveness of topical antifungal medications and can make monitoring improvement more difficult.
How YourMD Telehealth Can Help
Persistent foot itching or thickened toenails don’t always require an office visit. With YourMD Telehealth, Nevada residents can upload photographs and consult with a board-certified physician from home. When appropriate after reviewing your symptoms, secure asynchronous consultations start at $20, phone consultations are $40, and video visits are $50, with prescription antifungal medications sent electronically to your preferred pharmacy when clinically appropriate. If laboratory testing or referral is needed, we’ll explain your options. See also our guides to ringworm and common skin rashes.
References
- American Academy of Dermatology. Fungal Skin Infections: Diagnosis and Treatment.
- Ely JW, Rosenfeld S, Stone MS. Diagnosis and Management of Tinea Infections. American Family Physician. 2014.
- Gupta AK, Versteeg SG. Onychomycosis: Diagnosis and Management. Clinical Dermatology. 2017.
- Centers for Disease Control and Prevention. Fungal Diseases.
- American Podiatric Medical Association. Athlete’s Foot and Toenail Fungus.
This article is for general educational purposes and is not a substitute for individualized medical advice. Prescriptions are provided only when a physician determines treatment is clinically appropriate. Services currently available to Nevada residents 18 and older.