Contact Dermatitis in Brampton: Tracking Down What Irritates Your Skin

A rash that appears under a new watch strap. Red, stinging hands after a weekend of deep cleaning. Itchy eyelids a few days after trying a new eye cream, or a scalp that burns and swells after colouring your hair for a wedding. These are classic stories of contact dermatitis, a skin reaction caused by something that has touched the skin.

Contact dermatitis is very common, and it often resolves once the trigger is identified and avoided. The tricky part is the detective work. Reactions sometimes appear hours or even days after contact, and the culprit can be hiding in a product you have used for years without trouble.

This guide explains the two main types of contact dermatitis, the most common triggers in everyday life, how to calm a reaction, and when to seek help. The pharmacists at Pharmasave WestBram on Pertosa Drive can assess some forms of dermatitis as part of Ontario’s minor ailment program.

Two different ways skin reacts

Contact dermatitis is usually divided into two types, and the difference helps explain the pattern of symptoms.

Irritant contact dermatitis is the more common type. It happens when a substance directly damages the outer layer of the skin. Anyone can develop it with enough exposure. Repeated hand washing, detergents, solvents, cleaning products, and prolonged contact with water are typical causes. It often stings or burns as much as it itches, and it tends to appear where exposure is greatest, such as the backs of the hands and between the fingers.

Allergic contact dermatitis happens when the immune system becomes sensitised to a specific substance. Not everyone reacts, and the first exposures may cause no problem at all. Once a person is sensitised, even a small amount can trigger a reaction, usually 24 to 72 hours after contact. It tends to be intensely itchy and may spread beyond the exact area of contact.

Both types can look similar: redness or darkening of the skin, dryness, scaling, swelling, and sometimes small blisters that weep. On darker skin tones, the affected area may look purple, brown or grey rather than red.

Everyday irritants around the home and workplace

Irritant reactions usually come from cumulative wear and tear on the skin. Common culprits include:

• Dish soap, laundry detergent and household cleaners
• Bleach and disinfectants
• Frequent hand washing and hand sanitiser on already damaged skin
• Solvents, oils and greases in mechanical and industrial work
• Cement and plaster in construction
• Food handling, particularly acidic foods, onions and garlic
• Wet work, such as hairdressing, health care, cleaning and food service

Brampton has a large workforce in manufacturing, logistics, construction, health care and food processing, and many people’s jobs involve frequent glove use, hand washing or contact with chemicals. Irritant hand dermatitis is particularly common in these settings.

Allergens that commonly cause reactions

Some of the most frequent causes of allergic contact dermatitis include:

• Nickel, found in jewellery, belt buckles, watch backs, jean buttons, eyeglass frames and some phone cases
• Fragrances, in perfumes, lotions, soaps, shampoos and cleaning products
• Preservatives, such as certain isothiazolinones and formaldehyde-releasing preservatives in cosmetics, wipes and household products
• Hair dye ingredients, especially para-phenylenediamine (PPD), found in many permanent dark dyes
• Black henna, which may contain added PPD and can cause severe reactions. Natural henna is brownish-orange; “black henna” temporary tattoos are a common source of sensitisation.
• Rubber accelerators in gloves and elastic
• Topical medicines, including some antibiotic ointments and anaesthetic creams
• Adhesives, such as those in bandages and some medical devices
• Plants, such as poison ivy, which grows in parts of Ontario

During wedding and festival seasons, mehndi and hair colouring are common. Traditional henna rarely causes allergy, but products marketed as “black henna” or “instant” henna can. If you have ever reacted to hair dye, mention it before getting a temporary tattoo, and vice versa.

Where the rash appears offers clues

The location of the rash can help point to the trigger:

• Earlobes, neck and wrists: jewellery or watches containing nickel
• Below the navel: metal jean snaps or belt buckles
• Eyelids: cosmetics, nail polish (from touching the eyes), eye drops or contact lens solutions
• Scalp, hairline, ears and neck: hair dye, shampoo or styling products
• Hands: soaps, detergents, gloves, work materials
• Feet: shoe materials such as leather tanning agents, dyes or rubber
• Face: skincare products, fragrances, or substances transferred from the hands

Thinking about what touched that exact area over the past few days is often the most useful step.

Calming a reaction at home

For a mild reaction, the first priority is to identify and stop contact with the suspected trigger. Then:

• Wash the area gently with lukewarm water and a mild, fragrance-free cleanser to remove any remaining substance.
• Apply cool, damp compresses to soothe itching and weeping skin.
• Use a bland, fragrance-free moisturiser to support the skin barrier as it heals.
• Avoid scratching. Keeping nails short helps.
• Avoid adding new products to the area while it is healing, as irritated skin is more prone to further reactions.

Non-prescription hydrocortisone creams of lower strength may help small areas of mild dermatitis in adults. Follow the label instructions, avoid using them on the face for long periods unless advised, and ask the pharmacist if you are unsure. Oral antihistamines may help with itch for some people, though they are less effective for dermatitis itch than for hives.

Protecting hands at work and at home

Since hands are the most common site, protecting them makes a big difference:

• Wear gloves for wet work and cleaning. Choose the right glove type for the task, and consider cotton liners under rubber or nitrile gloves to reduce sweating.
• If you react to latex or rubber, ask about alternative glove materials.
• Moisturise after every hand wash and at bedtime.
• Use lukewarm water and pat hands dry.
• Remove rings during wet work, as irritants can get trapped underneath.
• Talk to your employer or occupational health team if work exposures are causing ongoing dermatitis.

When a pharmacist can help

Ontario pharmacists can assess and, where appropriate, prescribe treatment for certain types of dermatitis as a minor ailment. During an assessment, the pharmacist will ask about the rash, possible exposures, your medical history and any medicines you take. They may recommend avoiding a trigger, suggest a non-prescription product, prescribe a treatment within their scope, or refer you to a doctor. Learn more on our skin irritations and dermatitis page and the minor ailments overview.

If a rash looks more like hives, with raised, itchy welts that come and go, see our insect bites and hives page. Hives are a different type of reaction with different causes.

Signs that need a doctor or urgent care

Seek medical attention if:

• The rash is widespread, very painful or blistering extensively
• The face, eyes, lips or genitals are significantly swollen
• You develop signs of infection: increasing pain, warmth, pus, yellow crusts or fever
• The rash does not improve after a week or two of avoiding the suspected trigger
• You keep getting dermatitis without a clear cause
• A reaction to hair dye causes significant swelling of the scalp or face

Call 911 for difficulty breathing, swelling of the tongue or throat, or feeling faint. These suggest a different, more serious type of allergic reaction.

For persistent or recurring allergic contact dermatitis, a doctor may refer you to a dermatologist or allergist for patch testing, which can identify specific allergens so you know what to avoid.

Reading ingredient lists to prevent repeat reactions

Once you know or suspect a trigger, reading ingredient lists becomes essential. Cosmetics in Canada must list their ingredients, often using standardised international names. “Fragrance-free” products are generally a better choice than “unscented,” which may contain masking fragrances. Keep a note on your phone of any confirmed allergens and their alternate names, and check every new product, because manufacturers can change formulations.

When trying a new skincare product, cosmetic or hair product, a simple use test can lower the risk of a widespread reaction. Apply a small amount to a limited area, such as the inner forearm or behind the ear, once or twice a day for several days, and watch for redness, itching or swelling. Hair dye packages usually include their own allergy test instructions, which should be followed every time, even if you have used the same brand before. Sensitisation can develop after many uneventful uses.

It is also worth thinking about products other people in your home use. A partner’s aftershave, a child’s slime toy, a new laundry detergent or a scented fabric softener can all reach your skin indirectly. If a rash keeps returning despite changing your own products, look at what is shared across the household.

Bring your rash questions to Pharmasave WestBram

Contact dermatitis can be frustrating, but it usually improves once the trigger is found. If you would like help with the detective work or want to know whether a rash can be treated at the pharmacy, we are here.

Visit Pharmasave WestBram, 100 Pertosa Drive, Brampton, ON L6X 0H9, or call (905) 454-5111 to speak with a pharmacist. See our contact page for directions, or request a minor ailment assessment on our booking page.

This article provides general information about skin reactions. It is not a diagnosis. Please speak with a pharmacist or physician about any rash, and seek emergency care for signs of a severe allergic reaction.