Intertrigo is a common skin condition that causes a red, irritated rash in the folds of your skin. It can appear in areas like the armpits, groin, belly button, and between the fingers and toes. Left untreated, it can become infected with bacteria or fungus. This article explains what intertrigo is, what causes it, how to recognize it, and what treatments are available to Canadians.
What Is Intertrigo?
Intertrigo is an inflammation of the skin that develops where skin rubs against skin. These warm, moist areas create the perfect environment for irritation and infection. The condition is not contagious, but it can become uncomfortable and even painful without proper care.
Anyone can develop intertrigo, but some people are more vulnerable than others. Babies, older adults, and people who carry extra weight are at higher risk. Hot, humid weather — something many Canadians experience during summer months — can also make it worse.
According to Mayo Clinic, skin fold inflammation is a very common condition seen in patients of all ages and backgrounds. Understanding it early can help you manage it quickly and avoid complications.
Common Causes of Intertrigo
Intertrigo starts when skin surfaces rub together in a warm, moist area. This friction breaks down the outer layer of the skin. Once the skin barrier is damaged, it becomes easier for bacteria, fungi, or yeast to take hold.
Several factors can raise your risk of developing this condition. These include:
Being overweight or obese
Sweating heavily
Wearing tight or non-breathable clothing
Living in a hot, humid climate
Having diabetes or a weakened immune system
Being confined to bed for long periods
Wearing diapers (in infants or adults)
In Canada, the summer heat and humidity in provinces like Ontario and Quebec can trigger flare-ups in people who are already prone to this condition. Furthermore, people who work physical jobs outdoors during warm months may also be at increased risk.
Fungal vs. Bacterial Intertrigo
Intertrigo can be complicated by either a fungal or bacterial infection — and sometimes both at the same time. Knowing which type you have is important because the treatment is different for each.
Fungal intertrigo is most often caused by Candida, a type of yeast. It tends to produce a bright red rash with a whitish, scaly border. Bacterial intertrigo, on the other hand, may cause the skin to weep, crust over, or develop an unpleasant odour. A healthcare provider can help you figure out which type you are dealing with.
Recognizing the Symptoms of Intertrigo
The symptoms of intertrigo can range from mild to quite uncomfortable. Catching it early makes treatment much simpler. Most people notice changes in the affected skin within a few days of the irritation starting.
Common symptoms include:
A red or reddish-brown rash in a skin fold
Itching, stinging, or burning in the affected area
Raw or cracked skin
Moist or weeping skin surface
A whitish or scaly border around the rash (often a sign of fungal infection)
An unpleasant smell coming from the area
Pain or sensitivity when the skin folds touch each other
The rash caused by intertrigo often appears on both sides of the skin fold in a roughly symmetrical pattern. However, this is not always the case. Sometimes only one side is affected, especially in the early stages.
Where Does Intertrigo Appear?
Intertrigo can develop in any area where skin folds rub together. The most common locations include:
Armpits — a warm, frequently sweaty area
Groin — especially in people who are physically active or overweight
Under the breasts — a very common site in women
Belly folds — particularly in people with a larger abdomen
Between fingers and toes — where moisture can easily build up
Around the belly button — especially in people with deep navels
Neck folds — common in babies and older adults
In babies, intertrigo often appears as diaper rash or in the neck folds. In adults, it is most frequently found in the groin or under the breasts. For older Canadians who may spend time in long-term care settings, it can appear in areas that are difficult to keep dry and clean.
How Is Intertrigo Diagnosed?
In most cases, a doctor or nurse practitioner can diagnose intertrigo simply by looking at the affected skin. No special tests are usually needed at first. Your healthcare provider will ask about your symptoms, how long they have been present, and what makes them better or worse.
However, if there is any doubt about whether the rash is infected — or if it is not improving with basic treatment — your provider may take a small swab of the area. This swab is sent to a lab to identify whether bacteria or fungus are present. This helps confirm the right treatment plan for you.
In some cases, the rash may look similar to other skin conditions such as psoriasis, eczema, or a contact dermatitis reaction. Therefore, it is always a good idea to have a professional look at any persistent skin rash rather than guessing on your own.
Could It Be Something Else?
Several other skin conditions can look similar to intertrigo. These include ringworm (a fungal infection), inverse psoriasis, and seborrhoeic dermatitis. A trained healthcare provider can tell the difference. Getting the right diagnosis is the key to getting the right treatment.
Treatment Options for Intertrigo
Treating intertrigo involves two main goals: reducing skin irritation and clearing up any infection. The good news is that most cases respond well to relatively simple treatments. Many of these are available over the counter at Canadian pharmacies.
Keeping the Skin Dry and Clean
The first step in treating intertrigo is keeping the affected area as clean and dry as possible. Gently wash the area with mild soap and water, then pat it completely dry — never rub. Allowing the skin to air out whenever possible helps speed up healing.
You can also try placing a soft, dry cloth or gauze between skin folds to absorb moisture. Wearing loose, breathable clothing made of natural fibres like cotton can make a big difference. In addition, changing out of sweaty clothing promptly after exercise is an important habit to build.
Antifungal Creams
If your intertrigo has a fungal cause, your doctor will likely recommend an antifungal cream. Common options include clotrimazole, miconazole, or ketoconazole. These are available at most Canadian pharmacies, though some stronger formulations require a prescription.
Apply the cream as directed — usually once or twice daily — and continue using it for the full recommended course, even if the rash starts to look better. Stopping too early can allow the infection to return.
Antibiotic Treatments
When bacteria are causing the infection, your healthcare provider may prescribe a topical antibiotic cream. In more serious cases, oral antibiotics may be needed. These require a prescription from your family doctor or nurse practitioner.
As a result, it is important not to use leftover antibiotics from a previous prescription. Using the wrong antibiotic — or using one without a proper diagnosis — can make the situation worse and contribute to antibiotic resistance.
Antiseptics and Barrier Creams
Antiseptic washes can help keep the skin fold clean and reduce the risk of infection spreading. Barrier creams containing zinc oxide are also widely used. These creams create a protective layer on the skin that helps reduce friction and keeps moisture out.
For babies with diaper-related intertrigo, barrier creams are often the first line of defence. Many parents in Canada already use zinc oxide-based diaper creams, which work well for this purpose.
For more detailed guidance on skin conditions, Healthline’s intertrigo resource offers helpful information from medical reviewers.
Preventing Intertrigo From Coming Back
Once you have had intertrigo, you are more likely to get it again — especially in warm weather or if the underlying risk factors do not change. However, there are several practical steps you can take to prevent it from returning.
Keep skin folds clean and dry every day
Use absorbent powder (like cornstarch-based powder) in high-risk areas
Wear moisture-wicking or loose, breathable clothing
Maintain a healthy weight, which reduces the number and depth of skin folds
Manage underlying conditions like diabetes, which increase your risk
Stay hydrated and shower after heavy sweating
Change bed linens and clothing regularly
For Canadians living with diabetes, keeping blood sugar levels well controlled is especially important. High blood sugar creates an environment where yeast and bacteria thrive. Working with your healthcare team to manage your diabetes can significantly reduce the frequency of intertrigo flare-ups.
Furthermore, if you notice the early signs of a rash developing in a skin fold, acting quickly — by keeping the area dry and clean — can prevent a full outbreak from taking hold.
Health Canada provides a range of resources on skin health and managing chronic conditions that can contribute to recurring skin infections.
When to See a Doctor
Many mild cases of intertrigo can be managed at home with good hygiene and over-the-counter products. However, there are times when you should reach out to a healthcare provider. Do not ignore a rash that is getting worse rather than better.
You should see a doctor or visit a walk-in clinic if:
The rash is spreading beyond the skin fold
You develop a fever or chills alongside the rash
The skin becomes very painful, swollen, or starts to bleed
There is a strong, foul odour coming from the area
Over-the-counter treatments have not helped after one to two weeks
You are not sure whether the rash is intertrigo or something else
You have diabetes or a weakened immune system and develop any skin rash
In Canada, you can visit your family doctor for a proper assessment and prescription if needed. If you do not have a family doctor — as is the case for many Canadians — a walk-in clinic is a convenient option. Most provincial health plans cover visits for conditions like this, so cost should not be a barrier to getting checked out.
It is always better to get a professional opinion early rather than waiting for a rash to become a serious infection. As always, speak with your doctor or nurse practitioner before starting any new treatment, including over-the-counter creams and powders.
Frequently Asked Questions About Intertrigo
What does intertrigo look like?
Intertrigo typically appears as a red or reddish-brown rash inside a skin fold. The skin may look moist, raw, or cracked, and there is often a whitish, scaly border when a fungal infection is involved. The rash is usually found on both sides of the fold in a roughly symmetrical pattern.
Is intertrigo contagious?
No, intertrigo itself is not contagious. It is caused by friction, heat, and moisture between skin folds rather than by contact with another person. However, if a secondary fungal or bacterial infection develops, it is important to practise good hygiene to avoid spreading those microorganisms.
How long does intertrigo take to heal?
With proper treatment, mild cases of intertrigo can begin to improve within a few days. However, full healing may take one to three weeks depending on whether an infection is present and how well the area can be kept dry. Persistent or recurring intertrigo should be assessed by a healthcare provider.
Can intertrigo go away on its own?
Very mild cases of intertrigo may improve with basic hygiene and keeping the skin dry. However, once a bacterial or fungal infection develops, it is unlikely to clear up without treatment. It is best to address intertrigo early rather than waiting to see if it resolves on its own.
What is the best cream for intertrigo?
The best cream for intertrigo depends on the cause. Antifungal creams like clotrimazole or miconazole work well when a fungal infection is present. For bacterial infections, a topical antibiotic prescribed by your doctor is more appropriate. A zinc oxide barrier cream can help in all cases to reduce friction and protect the skin.
Can children get intertrigo?
Yes, children — especially infants — can develop intertrigo. In babies, it most commonly appears as diaper rash or in the neck and wrist folds. Keeping the skin clean, dry, and protected with a barrier cream is the main approach to managing intertrigo in young children.
Key Takeaways
Intertrigo is a skin rash that forms in warm, moist skin folds due to friction and moisture. Common locations include the armpits, groin, under the breasts, and between the fingers and toes. It can become infected with bacteria or fungus, which requires specific treatment. Antifungal
