How Can You Get Ringworm?

You get ringworm by coming into direct contact with a fungus — not a worm. The fungi that cause it are called dermatophytes. They feed on keratin, the protein in your skin, hair, and nails. You can pick them up from an infected person, an animal, soil, or even a damp locker room floor. The rash is often round with a raised, scaly edge, which is where the misleading name comes from.

What Actually Causes Ringworm?

Ringworm is a fungal infection, not a parasite or a worm. The organisms responsible are dermatophytes — a group of molds that digest keratin. Because keratin is what makes up the outer layer of your skin, your hair, and your nails, those are the areas dermatophytes can colonize.

Several different fungi can cause ringworm. The most common belong to the genera Trichophyton, Microsporum, and Epidermophyton. The specific fungus involved often determines where on the body the infection shows up and how it looks.

What all dermatophytes share is a preference for warm, moist environments. That is why infections tend to appear in skin folds, between the toes, and in the groin. It is also why sweaty socks and shared shower floors are common points of transmission.

Ringworm does not appear spontaneously. You have to encounter the fungus. There is no evidence that stress, diet, or “toxins” cause it on their own, though a weakened immune system can make you more vulnerable once exposure happens.

How Can You Get Ringworm From Other People?

Person-to-person contact is one of the most common routes. This happens through direct skin-to-skin contact with someone who has an active infection. It can also happen indirectly, through shared objects.

The fungus can survive on surfaces for extended periods. Items that commonly carry it include:

• Towels and washcloths
• Bedding and pillows
• Combs, brushes, and hair accessories
• Clothing, especially items worn against the skin
• Sports equipment like mats and helmets
• Shower floors and locker room surfaces

This is why ringworm spreads easily in households, schools, and athletic teams. It is not a sign of poor hygiene. A person can be perfectly clean and still pick up the fungus from a shared mat or a family member’s towel.

Infections of the feet are commonly called athlete’s foot, and infections of the groin are called jock itch. Both are forms of ringworm caused by the same group of fungi. They can spread from one part of your body to another. Touching an infected foot and then the groin, for example, can move the infection.

Can You Get Ringworm From Animals?

Yes. Animal-to-human transmission is well documented and is a frequent source of infection, especially in children.

Cats and dogs are the most common culprits. Kittens and puppies are particularly likely to carry and spread the fungus because their immune systems are still developing. The animal may have visible patches of missing fur or scaly skin — or it may show no obvious signs at all.

Other animals that can transmit dermatophytes include:

• Cattle
• Rodents
• Horses
• Rabbits and guinea pigs
• Farmed animals like sheep and goats

If you handle an infected animal, wash your hands thoroughly afterward. Wearing gloves when treating skin lesions on pets is a reasonable precaution. If a pet has a suspicious patch, a veterinarian can confirm whether it is a fungal infection.

Can You Get Ringworm From Soil?

Soil can carry dermatophytes, though this route is less common than person-to-person or animal contact. Some species of Microsporum live in soil and can infect people who have prolonged contact with it.

Gardening, farming, and outdoor work increase the chance of soil exposure. The fungus enters through small breaks in the skin or contacts skin directly. This route is more often reported in tropical and rural areas.

Soil transmission does not require you to be dirty. The fungus is simply present in the environment in some regions, and direct contact is enough.

Who Is More Likely to Get Ringworm?

Anyone can get ringworm, but some factors raise the odds. These are about exposure and susceptibility, not about being unclean.

The risk is higher for:

• Children, who have more close contact with each other and with pets
• People who play contact sports like wrestling
• People who use shared locker rooms and showers
• People who live in warm, humid climates
• People who wear tight clothing or sweat heavily
• People with weakened immune systems
• People who handle animals or work with soil

A weakened immune system does not cause ringworm by itself. It makes an infection more likely to take hold and harder to clear once exposure occurs. This includes people taking immunosuppressive medications and those with certain medical conditions.

Diabetes is often mentioned as a risk factor, particularly for fungal foot infections. The relationship is real but the details are complex, and it is not the same as saying diabetes causes ringworm.

How Does Ringworm Spread on Your Own Body?

Once you have ringworm in one spot, you can spread it to other parts of your body. This is called autoinoculation, and it is common.

Scratching an infected area can transfer the fungus to your fingers. Touching another part of your skin then deposits it there. This is one reason the infection sometimes appears in several places at once.

Common patterns include:

• Feet to groin, often through underwear or hands
• Scalp to face or neck
• One hand to the other

Keeping the infected area covered and washing your hands after touching it reduces the chance of spreading it. Treating the infection properly also limits how far it can travel.

How Can You Reduce Your Risk?

Prevention focuses on breaking the routes of transmission. The fungus needs contact with your skin to cause infection, so interrupting that contact is the goal.

Practical steps include:

• Wash your hands after touching animals or soil
• Avoid sharing towels, clothing, and personal items
• Wear sandals or shower shoes in public locker rooms and pools
• Keep your skin clean and dry, especially in skin folds
• Change socks and underwear daily, and more often if you sweat heavily
• Shower after contact sports and dry off completely
• Check pets for patches of missing fur or scaly skin

If someone in your household has ringworm, washing their bedding and towels separately can help. The fungus is generally susceptible to standard laundry washing, though hot water and thorough drying add a margin of safety.

No vaccine currently exists for ringworm in humans. Prevention depends on hygiene and avoiding contact with infected sources.

When Should You See a Doctor?

Many cases of ringworm can be treated with over-the-counter antifungal creams. But some situations call for medical care.

See a healthcare provider if:

• The rash is on your scalp or in your beard area
• The infection covers a large area
• It is not improving after using an antifungal product as directed
• You have a weakened immune system
• Signs of a bacterial infection appear, such as pus, warmth, or increasing pain

Scalp ringworm usually needs prescription oral medication because topical creams do not penetrate hair follicles well. This is a common reason people do not get better on their own.

It is also worth noting that many skin conditions look like ringworm but are not. Eczema, psoriasis, and a form of skin inflammation called nummular dermatitis can all produce round, scaly patches. A doctor can tell the difference, sometimes with a simple skin scraping.