Athlete’s foot most commonly appears as cracked, scaly skin between the toes, especially in the gap between the fourth and fifth toes. The affected skin typically looks red or whitish and waterlogged, with peeling edges and small fissures. But this is only one version of the infection. Athlete’s foot actually takes several distinct forms, and each one looks quite different.
Between the Toes: The Most Common Type
The interdigital type is what most people picture when they think of athlete’s foot, and it’s the most frequently diagnosed form. It shows up as redness, peeling, and soggy-looking skin in the web spaces between your toes. The fourth and fifth toes (your smallest two) are almost always affected first.
In mild cases, you might just notice some dry flaking between those toes. As it progresses, the skin turns whitish and waterlogged, a texture sometimes described as macerated, like skin that’s been soaked in water too long. Small cracks or splits (fissures) develop in the softened skin, and the surrounding area looks red and irritated. The itching and burning tend to be worst when you take off your shoes and socks after a long day.
Scaling on the Sole: Moccasin Type
Moccasin-type athlete’s foot looks nothing like the typical between-the-toes version, which is why many people don’t recognize it as a fungal infection at all. Instead of soggy, cracked skin, you’ll see dry, scaly patches across the bottom of your foot. The skin may feel thickened and rough, and the scaling is often pink or red underneath.
The name comes from the pattern: in its classic form, the scaling covers the entire sole, wraps around the edges of the foot, and stops at the top, creating a line that looks like you’re wearing a moccasin shoe. In earlier or less advanced cases, the scaling may only extend from the toes to the mid-sole, a “half-moccasin” pattern. This type tends to be chronic, developing gradually over weeks or months. Many people mistake it for plain dry skin and treat it with moisturizer, which doesn’t help because the underlying cause is fungal.
Blisters on the Sole: Vesicular Type
The vesicular type is the most visually dramatic form of athlete’s foot. It produces small bumps or fluid-filled blisters, most often on the bottom of the foot, though they can appear anywhere. The blisters range from tiny pinpoint bumps to larger clusters, and they’re usually filled with clear fluid. The surrounding skin is red and inflamed.
When the blisters break, they leave raw, weepy patches that can be quite painful. This type is sometimes confused with dyshidrotic eczema, a non-fungal condition that also causes small blisters on the feet and hands. The key difference: athlete’s foot blisters tend to cluster on the soles and instep, while eczema blisters often appear on the sides of fingers and toes simultaneously and can affect multiple body areas at once.
Ulcerative Type: The Most Severe Form
When interdigital athlete’s foot is left untreated and gets worse, it can progress to an ulcerative form. This typically starts between the third and fourth toe spaces and spreads outward to the side or bottom of the foot. The skin becomes deeply macerated and eroded, with raw, open areas that have scaly borders. The tissue may ooze and have a strong odor.
This form is the most likely to develop a secondary bacterial infection, because the broken skin creates an entry point for bacteria. Signs that a bacterial infection has set in on top of the fungal one include increasing redness that spreads beyond the original area, swelling, warmth, pus, and worsening pain rather than just itching.
How It Differs From Eczema
Athlete’s foot and foot eczema can look similar at first glance, since both cause redness, scaling, and sometimes blisters. A few visual clues help tell them apart.
- Location pattern: Athlete’s foot strongly favors the toe web spaces and soles. Eczema can appear anywhere on the body, and if it’s on your feet, it often shows up on the tops of the feet or ankles as well.
- Symmetry: Athlete’s foot frequently affects one foot more than the other, or starts on just one foot. Eczema tends to appear on both feet at the same time.
- Skin texture: Athlete’s foot produces waterlogged, peeling skin between the toes. Eczema causes skin that looks dry, rough, or leathery, and scratching may produce oozing of clear fluid.
- Other patches: If you also have red, dry, inflamed patches on your hands, elbows, or behind your knees, eczema is more likely. Athlete’s foot stays on the feet (though it can spread to the groin or hands through direct contact).
When It Spreads to Toenails
Left untreated, athlete’s foot can migrate into one or more toenails. You’ll notice the nail gradually becoming thicker than normal and taking on a cloudy yellow color. The nail may become brittle and crumbly at the edges, and chalky white or yellowish debris can build up underneath it. The nail may also separate slightly from the nail bed.
Once the fungus reaches the nails, it’s significantly harder to treat. Over-the-counter antifungal creams that work on skin infections generally can’t penetrate the nail well enough to clear the infection, so catching athlete’s foot before it reaches the nails makes treatment much simpler. If your toenails are already thickened and discolored, that’s a sign the infection has been present for a while and may need a more aggressive approach.
What to Look For First
If you’re examining your feet and trying to figure out whether you have athlete’s foot, start between your smallest toes. Peel them apart gently and look for any redness, whitish peeling, or small cracks. Then check your soles for unusual dryness or scaling that doesn’t improve with regular moisturizer. Finally, look for any small blisters, especially on the arch or ball of the foot.
The infection often starts subtly. A little peeling between the toes, some mild itching after exercise. It doesn’t always look dramatic, and in the moccasin type, it may not even itch much. The most reliable early signs are peeling or flaking skin in the toe web spaces and itching or burning that gets worse in warm, enclosed shoes.