Athlete's foot is one of the most common fungal skin infections in the world, yet it is frequently undertreated, misidentified, or treated for too short a period to actually clear it. It is caused by the same group of fungi responsible for ringworm and jock itch, dermatophytes that thrive in warm, moist environments and feed on the keratin in skin. The condition is named for the environment where it spreads most readily, but you do not have to be an athlete to get it. Anyone who uses shared showers, locker rooms, or pool decks, or whose feet spend extended time in warm, enclosed shoes, is at risk.

Understanding athlete's foot fully means understanding that it presents in more than one way, that it can spread to other parts of the body if left untreated, and that completing the full treatment period is the difference between clearing the infection and dealing with it again in a few weeks.

What Athlete's Foot Is

The medical name for athlete's foot is tinea pedis. It is a dermatophyte infection of the skin of the feet, most commonly affecting the spaces between the toes, though it can spread to the soles, sides, and tops of the feet. The same fungi can also spread to the toenails, which is a more serious and harder-to-treat form of the infection, and to the hands and groin if the fungi are transferred by touch or contact.

Athlete's foot is not a single presentation. There are several distinct forms, and knowing which one you have helps explain why the rash looks the way it does and whether the treatment approach is working.

Types of Athlete's Foot

Interdigital (between the toes)

The most common form. It typically starts in the space between the fourth and fifth toes, where moisture tends to collect. Symptoms include itching, scaling, peeling, and sometimes cracking or maceration of the skin. The skin may appear whitish or softened in the affected area. In more severe cases the skin can crack, which is painful and creates an entry point for bacterial infection.

Moccasin type

This form covers the sole of the foot, the heel, and sometimes the sides of the foot in a pattern that resembles a moccasin. The skin becomes dry, thickened, and scaly. It is frequently mistaken for dry skin, eczema, or a dermatitis condition rather than a fungal infection, which is one reason it often goes untreated for extended periods. The itching may be less intense than the interdigital form, making it easier to dismiss. Both feet are often affected simultaneously.

Vesicular type

This form produces fluid-filled blisters, usually on the arch of the foot or the instep. It tends to appear suddenly and can be quite uncomfortable. The blisters may break open and leave raw, tender skin underneath. This form is less common than the interdigital and moccasin types and is more likely to be recognized as something that needs medical attention because it looks distinctly wrong.

Ulcerative type

The least common and most severe form, characterized by open sores or ulcerations, typically between the toes. It often involves a secondary bacterial infection alongside the fungal one. This form requires medical evaluation and is not typically managed with OTC antifungal treatment alone.

Symptoms

Symptoms depend on the type of athlete's foot, but common signs include:

• Itching, burning, or stinging between the toes or on the soles
• Scaling, peeling, or flaking skin
• Dry, thickened, or cracked skin on the soles or heels
• Redness or discoloration
• Softened or whitish skin between the toes
• Fluid-filled blisters
• An unpleasant odor

Not all of these symptoms appear in every case. The moccasin type in particular can produce only dryness and scaling without significant itching, which makes it easy to confuse with other skin conditions. If a dry, scaly rash on the sole of your foot is not responding to moisturizer, fungal infection is worth considering.

How Athlete's Foot Spreads

Athlete's foot spreads through contact with the fungi that cause it. The most common routes are:

• Contaminated floors and surfaces. The fungi that cause athlete's foot can survive on wet surfaces in locker rooms, pool decks, communal showers, and gym floors. Walking barefoot in these environments is a common way athlete's foot is contracted.
• Shared personal items. Towels, socks, and shoes that have been used by someone with an active infection can transfer the fungi to another person.
• Your own shoes and socks. Once the fungi are present, the warm, moist environment inside a shoe provides ideal conditions for them to persist and reinfect the foot after treatment if shoes and socks are not addressed.
• Autoinoculation. Athlete's foot can spread to other parts of your own body. Touching your feet and then touching other areas, particularly the groin, is a common way jock itch develops in people who already have athlete's foot. Pulling on underwear or pants while the feet are still damp or before washing hands is the most typical mechanism. It can also spread to the hands, a condition called tinea manuum.

Who Gets Athlete's Foot

The name suggests it only affects athletes, but the risk factors extend well beyond athletic environments. Athlete's foot is more likely when:

• Feet stay warm and moist for extended periods inside shoes or boots
• You walk barefoot in shared facilities such as locker rooms, public showers, or pool decks
• You wear synthetic socks that trap moisture rather than wicking it away
• You wear the same pair of shoes or boots every day without allowing them to dry out
• You share towels, socks, or shoes with others
• Your immune system is compromised
• You have diabetes, which increases susceptibility to foot infections
• You already have another tinea infection such as ringworm or jock itch

Wrestlers, BJJ practitioners, and other mat-sport athletes face elevated risk from shared training surfaces and skin-to-skin contact. But truck drivers, military personnel, and anyone else who spends long hours in boots or work shoes in warm conditions faces similar risk from a different source: the sustained heat and moisture that builds up inside enclosed footwear over the course of a long shift or deployment. Good foot hygiene and shoe management matter as much in those environments as they do in any gym locker room.

Treatment

Many cases of athlete's foot respond to OTC antifungal treatment when the right product is used consistently for the full labeled treatment period. The treatment period matters more than most people realize. Symptoms often improve before the infection is fully cleared, and stopping treatment early is the most common reason athlete's foot returns.

OTC antifungal options

OTC antifungal products for athlete's foot are available in several formats including creams, gels, sprays, powders, and medicated bar soaps. Common active ingredients include tolnaftate, terbinafine, clotrimazole, miconazole, and butenafine. Terbinafine and butenafine are generally considered among the more potent options for dermatophyte infections and may have shorter labeled treatment periods for athlete's foot. Always follow the specific directions on the product label. For more on how these ingredients work and how they differ, see our Antifungal Ingredients Guide.

Medicated antifungal soap

Defense Antifungal Medicated Bar Soap contains tolnaftate 1% and is an FDA-registered OTC drug product labeled for the treatment of most athlete's foot when used as directed. It is used during showering to bring the active antifungal ingredient into contact with affected skin as part of the cleansing routine. Some athletes use it alongside a topical antifungal cream as a two-step routine.

Treatment duration

For athlete's foot, OTC antifungal products are often used for one to four weeks depending on the active ingredient and the label directions. Terbinafine-based products sometimes have shorter labeled treatment periods. Tolnaftate- and clotrimazole-based products are often labeled for four weeks of use. Follow the product label and complete the full treatment period even when symptoms have visibly improved.

Treating your footwear

Treating the foot without addressing the footwear is one of the most common reasons athlete's foot keeps coming back. Fungi can survive inside shoes and reinfect the foot after treatment. Practical steps include:

• Rotate shoes so each pair has at least 24 hours to dry out between wearings
• Use an antifungal powder or spray inside shoes during treatment
• Wash socks in hot water and dry on high heat
• Consider replacing heavily worn shoes that have been worn through an active infection

The Connection to Nail Fungus

Athlete's foot left untreated or undertreated commonly spreads to the toenails. Nail fungus (onychomycosis) causes nails to become thickened, yellowed, brittle, or crumbly and may cause the nail to separate from the nail bed. Once the infection is established in the nail, OTC topical antifungal products are not effective because they cannot penetrate the nail plate deeply enough to reach the infection. Prescription oral antifungal medication, typically terbinafine or itraconazole, is the standard treatment for nail fungus and requires a physician visit.

This is one of the most important reasons to treat athlete's foot promptly and completely. Athlete's foot is often manageable with OTC treatment when caught early and treated consistently. Nail fungus that develops later is much harder to treat and often requires prescription care.

How to Help Prevent Athlete's Foot

• Wear footwear in shared facilities. Flip-flops or sandals in locker rooms, pool decks, communal showers, and gym floors significantly reduce contact with contaminated surfaces. This is one of the most important preventive steps for people who frequently use shared facilities.
• Keep feet dry. Dry your feet thoroughly after showering, paying particular attention to the spaces between the toes. Moisture trapped between the toes is the primary condition that allows the interdigital form of athlete's foot to develop.
• Choose socks that manage moisture. Wool or moisture-wicking socks keep feet drier than cotton, which retains moisture. Change socks if they become damp during the day.
• Rotate your shoes. Wearing the same shoes or boots every day does not give them sufficient time to dry out. At least 24 hours between wearings allows sweat to evaporate. For people who do not have the option to rotate footwear, such as military personnel in the field, antifungal powder inside boots and changing into dry socks as often as possible are practical steps.
• Do not share towels, socks, or shoes. These are direct transmission routes when athlete's foot is present.
• Shower after training or long shifts. Showering after workouts, mat time, or a long day in enclosed footwear helps remove sweat and possible contaminants from the skin. Defense Bar Soap and Defense Shower Gel are built around pharmaceutical-grade tea tree and eucalyptus essential oils known for their natural antifungal properties and support a thorough post-training or end-of-shift cleansing routine.
• Use body wipes when a shower is not available. For truck drivers, military personnel, and others who may not have immediate access to a shower, Defense Body Wipes provide a convenient hygiene option for wiping down the feet and between the toes after a long shift or training session. The wipes are formulated with tea tree oil and eucalyptus oil known for their natural antimicrobial properties and support general skin hygiene. They are not a substitute for antifungal treatment when an active infection is present.
• Treat athlete's foot promptly. Early treatment reduces the duration of the infection and the risk of spreading it to the toenails, the groin, or other people.

For a complete guide to skin infection prevention specific to contact sports, see How to Prevent Skin Infections in Combat Sports. For an overview of fungal infections, see Fungal Skin Infections Guide.

When to See a Doctor

See a medical professional if:

• The infection is not responding to OTC treatment after the full labeled treatment period
• The infection appears to have spread to the toenails. Nails that are thickened, discolored, crumbly, or separating from the nail bed may have onychomycosis, which requires prescription treatment.
• There are signs of bacterial infection such as significant redness, warmth, swelling, pus, or pain
• The infection is severe, widespread, or painful
• You have diabetes or circulatory issues affecting your feet, as foot infections in these populations require prompt medical attention

Frequently Asked Questions

Can athlete's foot spread to the groin?

Yes. The same fungi that cause athlete's foot also cause jock itch. The most common way athlete's foot spreads to the groin is by pulling underwear or pants up over infected feet while still damp, or by touching the feet and then the groin without washing hands in between. If you have both athlete's foot and jock itch at the same time, treating only one while ignoring the other makes it likely that both will persist or return.

Can you get athlete's foot without going to a gym or locker room?

Yes. Athlete's foot can develop from warm, moist conditions inside shoes or boots alone, from contact with an infected household member's towels or floor surfaces, or from walking barefoot on surfaces that carry the fungi. Truck drivers, military personnel, and anyone who spends long hours in enclosed footwear are at real risk regardless of whether they ever set foot in a communal shower.

How do I know if athlete's foot has spread to my nails?

Nail fungus typically causes nails to become thickened, discolored (yellow, white, or brown), brittle, or crumbly. The nail may separate partially from the nail bed. These changes develop gradually, which is why they are often attributed to injury or aging rather than infection. If your toenails show these changes and you have a history of athlete's foot, nail fungus is a reasonable possibility to discuss with a physician.

Is athlete's foot contagious?

Yes. Athlete's foot can spread to other people through direct skin contact, shared personal items, and contaminated surfaces. It can also spread to other parts of your own body. During an active infection, avoid sharing towels, socks, or shoes, and dry your feet thoroughly and separately from other body areas after bathing.

Can athlete's foot come back after treatment?

Yes, and it is common. The most frequent reasons are stopping treatment before the infection is fully cleared, not addressing footwear during treatment, and continued exposure in the same environments without taking preventive steps. Some people are simply more susceptible to dermatophyte infections than others and benefit from ongoing prevention habits even after clearing an active infection.

What is the difference between athlete's foot and dry skin?

Dry skin typically affects both feet evenly and responds to moisturizer. The moccasin form of athlete's foot can closely resemble dry skin, but it tends to have a more defined scaly border, does not respond to moisturizer, and may affect only one foot initially. Itching and odor are also more associated with fungal infection than simple dry skin. If a dry, scaly rash on the sole of your foot is not improving with moisturizer, a fungal infection is worth considering.

This article is for educational purposes only and is not medical advice. For diagnosis or treatment guidance, consult a qualified healthcare professional. See our full disclaimer.