Itchy feet are most commonly caused by fungal infections, dry skin, or contact allergies, but they can also signal deeper issues like nerve damage, liver disease, or kidney problems. The cause usually becomes clear based on where the itch is, what the skin looks like, and whether other symptoms are present.
Athlete’s Foot (Fungal Infection)
Fungal infection is the single most common cause of itchy feet. An estimated 3% of the world’s population has an active case at any given time, and the number climbs much higher among people who use shared showers, pools, or locker rooms. The fungus thrives in warm, moist environments, which makes the spaces between your toes an ideal home.
The most recognizable form shows up between the fourth and fifth toes as red, peeling, cracked skin that itches persistently. The top of the foot usually stays clear. A second type, sometimes called “moccasin” athlete’s foot, spreads across the sole in a slipper-like pattern with thick, scaly skin that may or may not itch. A third, more inflammatory type produces small fluid-filled blisters on the arch or ball of the foot that are both painful and intensely itchy. When those blisters break, the skin stays red and flaky.
Over-the-counter antifungal creams clear most cases within two to four weeks. The moccasin type is more stubborn and sometimes requires prescription treatment because the thickened skin makes it harder for topical medication to penetrate.
Contact Allergies From Footwear
Your shoes contain a surprising number of chemicals that can trigger allergic reactions. Chromium salts are present in more than 90% of tanned leather footwear samples, and they’re one of the most common culprits behind shoe-related contact dermatitis. Rubber components in soles and insoles contain vulcanization chemicals that are also frequent allergens. Even the adhesives holding your shoes together can cause reactions, particularly a resin commonly used in shoe manufacturing.
Other triggers include dyes (especially in colored synthetic fabrics), nickel or cobalt in buckles, biocides added to prevent mold growth, and shoe refresher sprays. The itch and rash typically appear wherever the offending material contacts your skin, which helps distinguish this from fungal infections. If your feet itch only where your shoes touch and clear up when you go barefoot for a few days, a shoe allergy is a strong possibility. Patch testing through a dermatologist can identify the specific chemical.
Dyshidrotic Eczema
This form of eczema produces tiny, fluid-filled blisters about the size of a pinhead, usually along the edges of the toes or on the soles. They look like small, cloudy beads and sometimes merge into larger blisters. The itching can be intense, and when the blisters eventually dry, the skin cracks and peels.
Flare-ups typically last three to four weeks before clearing on their own, then return. Triggers include stress, seasonal allergies, excessive sweating, and exposure to certain metals like nickel or cobalt. If you notice a pattern of recurring blistery rashes on your feet that come and go on a roughly monthly cycle, this is a likely explanation.
Dry Skin and Environmental Causes
The skin on your feet has no oil glands, making it more prone to drying out than almost anywhere else on your body. Low humidity, hot showers, harsh soaps, and aging all strip moisture from the skin. The result is a diffuse, low-grade itch without any visible rash or blisters, often worst on the heels and soles. Regular use of a thick moisturizer, especially right after bathing, resolves most cases quickly.
Diabetes and Nerve Damage
Itchy feet are a surprisingly common complaint among people with type 2 diabetes, and the cause is often neurological rather than dermatological. The small sensory nerve fibers responsible for transmitting itch and pain signals are among the first to be damaged by high blood sugar. These fine nerves don’t always show up on standard nerve conduction tests, so you can have normal test results and still experience real symptoms.
Diabetes also damages the nerves that control sweating. When your feet can’t sweat normally, the skin becomes extremely dry and prone to cracking, creating a second pathway to itching. If you have diabetes and your feet itch without any visible rash, nerve involvement is a likely explanation worth raising with your care team.
Liver Disease
When bile flow from the liver becomes blocked or sluggish, a condition called cholestasis, itching that concentrates on the palms and soles is a hallmark symptom. The American Association for the Study of Liver Diseases describes this pattern as characteristic of cholestatic pruritus. The exact substance causing the itch hasn’t been identified, but the current understanding is that blocked bile leads to a buildup of compounds that activate itch-sensing nerve fibers in the skin.
This type of itch is distinctive: there’s no rash, no visible skin change, and it can be relentless. It often worsens at night. If you’re experiencing unexplained itching on both your palms and soles, especially alongside fatigue, dark urine, or yellowing of the skin or eyes, liver function is worth investigating.
Kidney Disease
Chronic kidney disease causes itching in up to half of people on dialysis. The itch tends to affect large areas of skin symmetrically, including the legs and feet, and is typically worse at night. Elevated phosphorus levels and imbalances in calcium have been linked to more severe itching, though the relationship isn’t perfectly consistent across studies. Adequate dialysis can help, but for many people, the itch persists and requires targeted treatment.
Hookworm and Parasitic Infections
If you’ve recently walked barefoot on warm, moist soil or sand, particularly in tropical or subtropical areas, a parasitic cause is worth considering. Hookworm larvae penetrate exposed skin on the feet and create a distinctive raised, reddish, winding track under the skin that moves several millimeters per day. The track is roughly 3 millimeters wide and intensely itchy. You might see a single track or several, depending on how many larvae entered the skin. This condition, called cutaneous larva migrans, is self-limiting but can be treated quickly with antiparasitic medication.
Why Itchy Feet Get Worse at Night
If your feet itch more when you climb into bed, you’re not imagining it. Your body’s circadian rhythm naturally shifts several factors in the evening that amplify itching. Blood flow to the skin increases, skin temperature rises, and your body produces less of the anti-inflammatory hormones (corticosteroids) that help suppress itch during the day. The result is a perfect storm: the same level of skin irritation that was manageable at noon becomes unbearable at midnight. This nighttime pattern occurs regardless of the underlying cause, which means it doesn’t help narrow down why your feet itch, but it does explain the timing.
Sorting Out the Cause
A few key details help distinguish between causes. Visible changes like peeling, redness, or blisters point toward fungal infections, eczema, or contact allergies. Itching with completely normal-looking skin suggests a systemic cause: nerve damage, liver issues, or kidney dysfunction. Location matters too. Itching concentrated between the toes is classic for athlete’s foot, while itching on both the palms and soles together raises suspicion for liver-related pruritus.
Pay attention to timing and triggers. Itch that correlates with specific shoes suggests contact allergy. Itch that flares in cycles of three to four weeks points toward dyshidrotic eczema. A winding, visible track after beach travel means parasites. And itch that appeared gradually alongside increased thirst, urination, or fatigue could be tied to diabetes or kidney function. These patterns give you and your doctor a meaningful starting point.