Ringworm is a common fungal skin infection that affects people of all ages across Canada. Despite its name, it has nothing to do with worms. It is caused by a group of fungi, and it produces red, circular, scaly patches on the skin that can spread quickly if left untreated. This guide covers everything you need to know — from causes and symptoms to treatment options available through your family doctor or local walk-in clinic.
What Is Ringworm?
Ringworm is a skin infection caused by fungi called dermatophytes. The medical term for the condition is tinea corporis. The fungi feed on keratin, a protein found in your skin, hair, and nails.
The name “ringworm” comes from the shape of the rash it creates. The infection forms a ring-shaped, red patch with a clearer centre. The edges of the ring are usually raised and scaly, while the inside may look normal or slightly irritated.
Ringworm is very common worldwide. According to the World Health Organization, fungal skin infections affect hundreds of millions of people globally every year. In Canada, it is one of the more frequent reasons people visit walk-in clinics for skin concerns.
What Causes Ringworm?
Ringworm is caused by a type of fungus called Trichophyton, among other dermatophyte species. These fungi thrive in warm, moist environments. They are highly contagious and can spread in several ways.
Person-to-Person Contact
Direct skin-to-skin contact with an infected person is one of the most common ways ringworm spreads. This makes it easy to pass along in households, schools, and sports settings. Children are particularly vulnerable because of close contact during play.
Contact with Animals
Pets, especially cats and dogs, can carry the fungi without showing obvious signs. Handling an infected animal and then touching your skin can transfer the infection. Farmers and people who work with livestock are also at higher risk.
Contaminated Surfaces and Objects
The fungi can survive on surfaces for a period of time. Sharing towels, clothing, combs, or sports equipment with someone who has ringworm can spread the infection. Public showers, locker rooms, and swimming pools are also common sources of exposure.
Soil Contact
In rare cases, ringworm can spread through contact with infected soil. However, this is far less common than person-to-person or animal-to-person transmission.
Recognising the Symptoms of Ringworm
Ringworm has a fairly distinctive appearance, which makes it easier to identify than many other skin conditions. However, symptoms can vary depending on where the infection appears on the body.
Common Signs to Watch For
Red, circular patches with a raised, scaly border
A clearer or normal-looking centre inside the ring
Itching or mild burning in the affected area
Patches that grow outward over time if untreated
Dry, flaky skin on or around the patch
Multiple rings that may overlap in severe cases
The patches can appear anywhere on the body. Common locations include the trunk, arms, legs, and face. The infection can also affect the scalp (tinea capitis), the feet (athlete’s foot), or the groin area (jock itch). Each of these has its own specific name, but they are all forms of the same type of fungal infection.
Symptoms usually appear between four and fourteen days after exposure to the fungus. The patches tend to spread outward fairly quickly if no treatment is started. For more information on identifying skin rashes, visit Mayo Clinic’s skin conditions resource.
Who Is at Risk?
Ringworm can affect anyone, but some people are more likely to develop the infection than others. Understanding your risk factors can help you take steps to prevent it.
Higher-Risk Groups
Children between the ages of three and seven are among the most commonly affected. The infection spreads easily in daycare centres and elementary schools. Parents should check their children’s skin regularly, especially if there is a known outbreak at school.
People with weakened immune systems — such as those living with diabetes, HIV, or undergoing chemotherapy — are also at higher risk. In these individuals, ringworm can be more difficult to treat and may spread more aggressively.
Athletes, particularly those involved in contact sports like wrestling, face increased exposure due to close physical contact and shared equipment. This form is sometimes called tinea gladiatorum. Wearing proper protective gear and washing sports equipment regularly can reduce risk.
Furthermore, people who live in hot and humid climates, or who sweat heavily, create ideal conditions for fungal growth on the skin. Keeping skin clean and dry is one of the most effective preventive measures.
How Is Ringworm Treated?
The good news is that ringworm is very treatable. Most cases respond well to over-the-counter antifungal products. However, some infections require a prescription from your family doctor.
Over-the-Counter Antifungal Treatments
Antifungal creams, lotions, and sprays are widely available at pharmacies across Canada without a prescription. Common active ingredients include clotrimazole, miconazole, and terbinafine. You apply these directly to the affected skin, usually once or twice a day for two to four weeks.
It is important to continue using the treatment for the full recommended period, even if the rash looks better before then. Stopping too early can allow the fungus to return. Always read the product label and follow the instructions carefully.
Prescription Treatments
If over-the-counter treatments do not work after two to four weeks, your family doctor may prescribe a stronger antifungal cream. In some cases — particularly when the scalp is involved or the infection is widespread — oral antifungal medication may be needed.
Oral medications such as terbinafine or fluconazole are taken by mouth for several weeks. These require a prescription and are covered under many provincial drug benefit programmes in Canada, depending on your province and eligibility. Ask your doctor or pharmacist about coverage under your provincial health plan.
Home Care Tips
Keep the affected area clean and dry at all times
Wash your hands thoroughly after touching the rash
Avoid sharing towels, clothing, or personal items
Wash bedding and clothing in hot water during treatment
Wear loose-fitting, breathable clothing to reduce moisture
Treat any infected pets at the same time to prevent reinfection
According to Healthline’s guide to ringworm treatment, most mild cases of ringworm clear up completely within two to four weeks with consistent antifungal treatment. In addition, good hygiene habits significantly reduce the chance of the infection coming back.
How to Prevent Ringworm
Prevention is straightforward once you understand how ringworm spreads. A few simple habits can greatly reduce your risk of infection or reinfection.
Always dry your skin thoroughly after bathing or swimming, especially in skin folds and between the toes. Fungi grow best in damp environments, so keeping your skin dry removes one of their key conditions for survival.
Avoid walking barefoot in public showers, locker rooms, and pool areas. Wear flip-flops or shower shoes in these spaces. If you visit a gym or community centre regularly, this habit is especially important.
Do not share personal items such as towels, hairbrushes, or clothing with others. Even if the other person shows no visible symptoms, they may still carry the fungus. This is particularly relevant in households with young children or athletes.
If you have a pet, take them to a veterinarian for regular check-ups. If your pet is diagnosed with ringworm, follow your vet’s treatment instructions promptly. Treating your pet and yourself at the same time prevents the infection from bouncing back and forth.
When to See a Doctor
Many cases of ringworm can be managed with over-the-counter treatments at home. However, there are situations where you should see a healthcare provider promptly.
Visit your family doctor or a walk-in clinic if:
The rash does not improve after two to four weeks of antifungal treatment
The infection is on your scalp or involves hair loss
The rash is spreading rapidly or becoming painful
You have a weakened immune system or a chronic health condition
The rash appears infected — with pus, warmth, or significant swelling
You are unsure whether the rash is ringworm or another skin condition
Walk-in clinics are a convenient option across most Canadian provinces if you cannot get a timely appointment with your regular family doctor. A healthcare provider can confirm the diagnosis — sometimes by looking at the rash under a special light or by taking a small skin scraping — and recommend the most appropriate treatment.
As always, this article is for informational purposes only. Please consult your family doctor or a qualified healthcare provider for personal medical advice and before starting any new treatment.
Frequently Asked Questions About Ringworm
Is ringworm contagious?
Yes, ringworm is highly contagious. It spreads through direct skin contact with an infected person, animal, or contaminated surface. Avoid sharing personal items and wash your hands regularly to reduce the risk of spreading ringworm to others.
How long does ringworm last?
With proper antifungal treatment, most cases of ringworm clear up within two to four weeks. Without treatment, ringworm can persist for months and continue to spread. Starting treatment early gives you the best chance of a quick recovery.
Can ringworm go away on its own?
Ringworm rarely goes away on its own without treatment. The infection tends to spread and worsen over time if left untreated. Antifungal cream from your local pharmacy is usually enough to treat a mild case of ringworm effectively.
What does ringworm look like at the beginning?
In its early stages, ringworm appears as a small, red, scaly patch on the skin. Over a few days, it typically grows into a ring-shaped rash with a raised border and a clearer centre. The patch may itch or feel slightly irritated.
Is ringworm covered by provincial health plans in Canada?
Doctor visits for ringworm are generally covered by provincial health plans across Canada. Over-the-counter antifungal creams are not typically covered, but they are affordable and widely available at pharmacies. Prescription oral antifungal medications may be covered depending on your province and specific drug benefit programme.
Can I go to school or work with ringworm?
In most cases, you can return to school or work once you have started antifungal treatment and the rash is covered. However, ringworm on the scalp may require your child to stay home until treatment has begun. Check with your family doctor or school for specific guidance on ringworm and attendance policies.
Key Takeaways
Ringworm is a fungal infection, not caused by a worm — the name refers to its ring-shaped appearance.
It spreads easily through contact with infected people, animals, or surfaces.
Symptoms include red, circular, scaly patches that grow outward and may itch.
Most cases are treatable with over-the-counter antifungal creams available at Canadian pharmacies.
See your family doctor or walk-in clinic if the rash does not improve, affects the scalp, or spreads rapidly.
Prevention is simple — keep skin dry, avoid sharing personal items, and treat infected pets promptly.
Always consult a healthcare provider for a proper diagnosis and personalised treatment advice.
