A candida infection is one of the most common fungal infections in Canada. It is caused by a type of yeast called Candida, which normally lives on your skin and inside your body without causing harm. However, when your immune system is weakened or your body’s natural balance is disrupted, candida can grow out of control and cause uncomfortable — sometimes serious — symptoms. This article explains what candida infection is, who is at risk, and what you can do about it.
What Is a Candida Infection?
Candida is a family of fungi that naturally lives on your skin, in your mouth, gut, and genital area. Under normal conditions, healthy bacteria keep candida levels in check. When that balance breaks down, an overgrowth happens — and that is when a candida infection develops.
This overgrowth is medically called candidiasis. There are roughly 200 species of Candida, but only five cause more than 95% of human fungal infections. Candida albicans is the most common by far. The others include C. parapsilosis, C. glabrata, C. tropicalis, and Pichia kudriavzevii.
Candida infections range from mild skin rashes to serious bloodstream infections. Invasive candidiasis — where the infection spreads to internal organs — carries a mortality rate of 20–40% in vulnerable groups, such as premature newborns and elderly people with other health conditions. For most Canadians, however, candida infections are superficial and very treatable.
According to Health Canada, fungal infections are a growing concern, partly because of rising rates of diabetes, cancer, and the broader use of antibiotics and immunosuppressant medications.
Common Types of Candida Infection
Candida infections are grouped by where they appear on the body. Knowing the type helps you understand what treatment may be needed.
Skin Candida Infection (Cutaneous Candidiasis)
Skin candida infections usually appear in warm, moist skin folds. Common spots include under the breasts, in the armpits, between the fingers, in the groin, and between the buttocks. Heat, sweating, and skin rubbing together create the perfect environment for candida to grow.
In babies, a candida skin infection often shows up as a persistent diaper rash. The main symptoms are burning and itching. You may also notice redness, small raised bumps, and white patches — a pattern called intertrigo.
Oral Candida Infection (Oral Thrush)
Oral thrush is a candida infection inside the mouth. It can affect anyone, but it is most common in babies, older adults, and people with weakened immune systems. Candida albicans is almost always the cause.
The most visible sign is creamy white patches on the tongue, inner cheeks, or throat. If you gently wipe these patches away, the area underneath looks red and may bleed slightly. This is one key way to tell oral thrush apart from leukoplakia — another white patch condition — which does not wipe off easily and has irregular edges.
Other symptoms of oral thrush include pain when swallowing, soreness at the lesion sites, and an unpleasant taste in the mouth. In babies, oral thrush can spread to the mother’s breast during breastfeeding, causing a cycle of re-infection. In chronic cases, the infection can spread down into the oesophagus.
For more detail on oral thrush symptoms, the Mayo Clinic’s guide to oral thrush is an excellent resource.
Vaginal Candida Infection (Vaginal Yeast Infection)
A vaginal candida infection — commonly called a yeast infection — is the first thing most people think of when they hear the word candida. Candida naturally lives in the vagina, mouth, and digestive tract in both men and women. Problems start when the body’s protective bacteria can no longer keep the yeast in check.
In a healthy vagina, protective microorganisms maintain an acidic pH that stops harmful organisms from growing. When that balance is disturbed — by antibiotics, hormonal changes, high blood sugar, or a weakened immune system — candida can take over.
Symptoms in women include:
Intense itching in and around the vagina
Burning during urination
Pain during sexual intercourse
Thick, white, cottage-cheese-like discharge
Redness and swelling of the labia
These symptoms often get worse just before a menstrual period. If you experience these symptoms for the first time, it is important to see your family doctor or visit a walk-in clinic rather than self-treating. Other conditions can look very similar.
Symptoms in men include:
Intense itching on and around the penis
Redness and swelling
White, cottage-cheese-like deposits on the glans (head of the penis)
Small red spots or irritation on the glans
The white discharge can also spread to the perineum and groin folds, causing further skin inflammation. In some cases, a candida infection can also trigger small cysts in the affected area.
Who Is at Risk for a Candida Infection?
Anyone can develop a candida infection. However, certain factors make it more likely. Understanding your personal risk helps you take steps to prevent it.
Key risk factors include:
Diabetes: High blood sugar levels create ideal conditions for yeast to grow. Keeping your blood sugar well controlled is one of the most effective ways to reduce your risk.
Antibiotic use: Antibiotics kill the healthy bacteria that normally keep candida in check. This is a very common trigger for vaginal yeast infections.
Weakened immune system: People living with HIV, those undergoing chemotherapy, or anyone taking immunosuppressant drugs face a higher risk of serious candida infections.
Dentures: Poorly fitting dentures create warm, moist spots in the mouth where oral thrush thrives.
Corticosteroids: Inhaled or oral steroids can reduce local immune defences in the mouth and airways.
Pregnancy: Hormonal shifts during pregnancy change vaginal chemistry, increasing susceptibility to yeast infections.
Tight or synthetic clothing: Clothing that traps heat and moisture against the skin creates a breeding ground for candida.
The rising rates of diabetes, cancer treatment, and HIV in Canada — combined with wider use of broad-spectrum antibiotics — have contributed to a steady increase in candida infection cases over recent decades.
How to Prevent a Candida Infection
Many candida infections can be prevented with simple lifestyle changes. These habits support your body’s natural defences and reduce the conditions candida needs to thrive.
Skin and General Prevention
Change out of wet clothing — like swimsuits or gym clothes — as soon as possible after use.
Change your underwear and socks frequently, especially in warm weather.
Avoid tight-fitting clothing that traps heat and moisture.
Use mild, fragrance-free soaps on sensitive skin areas.
Add probiotic-rich foods — such as yoghurt and kefir — to your daily diet.
Reduce your intake of sugar and refined carbohydrates, which feed yeast.
Blood Sugar Management
If you have diabetes, controlling your blood sugar is essential. Abnormal glucose levels directly fuel candida growth. Work with your family doctor or diabetes care team to keep your levels within a healthy range. This single step can significantly reduce your chances of recurring candida infections.
Oral Hygiene Habits
Brush your teeth with a soft-bristled toothbrush to avoid irritating any sores.
Replace your toothbrush at the end of any treatment period for oral thrush.
Avoid commercial mouthwashes unless your doctor has prescribed them.
If you use a breast pump, soother, or baby bottle, clean and disinfect them regularly using a solution of 50% water and 50% white vinegar.
Add unsweetened yoghurt to your daily diet to support healthy bacteria in your mouth and gut.
Treatment Options for Candida Infection
Treatment depends on the type and severity of the candida infection. Most superficial infections respond well to antifungal medicines available at Canadian pharmacies.
Over-the-Counter Treatments
For mild skin or vaginal candida infections, over-the-counter (OTC) antifungal creams, powders, or suppositories are often effective. Common active ingredients include clotrimazole and miconazole. These are widely available without a prescription at most pharmacies across Canada.
Prescription Treatments
If OTC treatments have not worked, your doctor may prescribe a stronger antifungal such as ketoconazole or nystatin. For oral thrush or moderate-to-severe skin infections, oral antifungal tablets may be needed. Serious or invasive candida infections — particularly in hospital settings — require intravenous antifungal therapy under close medical supervision.
For a thorough overview of antifungal treatment options, Healthline’s guide to candidiasis provides clear, evidence-based information.
When to See a Doctor
Not every candida infection needs a doctor’s visit. However, there are situations where professional care is important.
See your family doctor or visit a walk-in clinic if:
This is your first time experiencing these symptoms — you need a proper diagnosis before treating.
OTC treatments have not cleared the infection after one to two weeks.
You have recurring candida infections (more than four times per year).
You are pregnant.
You have diabetes, HIV, or another condition that affects your immune system.
You develop a fever, chills, or feel generally unwell alongside local symptoms — this could signal a more serious infection.
Symptoms are affecting your ability to eat, swallow, or carry out daily activities.
Most provincial health plans in Canada cover visits to family doctors for conditions like candidiasis. If you do not have a family doctor, walk-in clinics are available in most communities and can assess and treat most candida infections quickly and effectively.
Always speak with a qualified healthcare provider before starting any new treatment, especially if you are pregnant, breastfeeding, or managing other health conditions.
Frequently Asked Questions About Candida Infection
What are the most common signs of a candida infection?
The most common signs of a candida infection depend on where it occurs. Skin infections cause itching, redness, and white patches in body folds. Oral thrush produces creamy white patches in the mouth. Vaginal yeast infections cause intense itching, burning, and thick white discharge.
Can a candida infection go away on its own?
A mild candida infection may sometimes improve on its own if the underlying trigger — such as antibiotic use — is removed. However, most infections need antifungal treatment to fully clear. Leaving a candida infection untreated can allow it to worsen or spread, so it is best to treat it promptly.
Is a candida infection contagious?
Candida infections are not generally considered contagious in the same way as a cold or flu. However, oral thrush can pass between a breastfeeding baby and mother. Sexual transmission of a candida infection is possible but uncommon. Good hygiene and prompt treatment help prevent spreading.
What foods should I avoid if I have a candida infection?
Candida feeds on sugar and refined carbohydrates, so reducing these in your diet can help. Foods to limit include white bread, sugary drinks, sweets, and alcohol. Adding fibre-rich foods, unsweetened yoghurt, and probiotic-rich options like kefir may support your body’s natural defences against a candida infection.
Why do I keep getting candida infections?
Recurring candida infections are often linked to an underlying condition such as uncontrolled diabetes, a weakened immune system, or frequent antibiotic use. Hormonal changes and tight clothing can also be factors. If you are getting more than four candida infections per year, speak with your family doctor to investigate the root cause.
How is a candida infection diagnosed in Canada?
A doctor can often diagnose a candida infection based on your symptoms and a physical examination. In some cases, they may take a swab of the affected area for laboratory testing to confirm the diagnosis and identify the specific strain. This service is covered under most provincial health plans when ordered by a family doctor or walk-in clinic physician.
Key Takeaways
A candida infection is caused by an overgrowth of yeast that naturally lives in and on your body. The most common types are skin infections, oral thrush, and vaginal yeast infections. Risk factors include antibiotic use, diabetes, a weakened immune system, and poor hygiene habits.
