Seasonal Contact Dermatitis vs. Eczema
April 2026
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Symptoms of irritation, itchiness, and redness on the skin can be easily confused for dermatitis or eczema. If you’re experiencing any of these skin issues, it’s essential to determine their cause and explore effective treatment options.
Contact dermatitis and eczema are often confused because their symptoms can be very similar. In reality, contact dermatitis and eczema are quite different skin conditions with dissimilar causes, triggers, and treatments.
In this Derm Deep Dive, we explain how to identify contact dermatitis – specifically the seasonal type – and eczema, which can flare up for numerous reasons, including the drier winter air.
What Is Contact Dermatitis?
Contact dermatitis happens when the skin comes in contact with something that triggers an immune-related or allergic reaction. Contact dermatitis is not contagious, but it can be severe enough to require dermatological care to treat persistent itching and rash.
There are two broad types of contact dermatitis:
Irritant Contact Dermatitis: This type is caused by direct damage to the skin barrier from potential irritants like detergents or fragranced soaps. Anyone can develop this type of contact dermatitis, especially after prolonged exposure.
Allergic Contact Dermatitis (ACD): This type of contact dermatitis is an immune reaction in which an allergen weakens the skin’s barrier – common culprits are nickel, plant oils (such as poison ivy), or harsh products – causing itchiness, redness, burning, or dryness.
Seasonal allergic contact dermatitis can occur when specific environmental allergens or plant oils (such as poison ivy) are more prevalent, leading to flares in those who have developed sensitivity.
What Is Eczema (Atopic Dermatitis)?
Atopic dermatitis (AD) – the most common form of eczema – is a chronic inflammatory skin condition characterized by dry, itchy, and scaly skin. While there is no single known cause, it has been linked to immune dysregulation, genetic factors, and a compromised skin barrier.
Unlike contact dermatitis, atopic dermatitis isn’t caused by direct contact with the skin; rather, it flares in response to aggravating internal or environmental factors. Dermatologists often rely on clinical patterns and history to diagnose contact dermatitis since its presentation can vary widely across age groups and skin types.
Why Am I Experiencing Seasonal Skin Issues?
The dry air, changes in humidity, or temperature extremes can all cause atopic dermatitis or eczema flare-ups by zapping moisture from the skin, weakening the skin barrier and triggering itchiness or inflammation.
Other common eczema triggers include pollen, mold, dust mites, stress, excessive sweating, harsh skincare products, and hot showers. Because eczema causes the skin to have such a heightened sensitivity to the trigger, symptoms can occur even without direct contact with the irritant.
Allergic contact dermatitis is often triggered by repeated exposure to certain metals like nickel; fragrances or detergents; oils from poison ivy, poison oak, or poison sumac; or other harsh products.
Contact dermatitis can worsen during seasons like spring and summer with heightened outdoor allergens.
When to Visit Your Dermatologist
If you think you have eczema or contact dermatitis – whether it seems to be seasonal or not – it’s important to visit your dermatologist for an official diagnosis that can inform an effective treatment.
Your dermatologist will ask you several questions about when you get the skin reaction and how it manifests in order to determine potential triggers. They will look for:
- A consistent pattern of the skin irritation appearing after contact with a certain substance or during a certain activity; i.e. your hands always become red and itchy after gardening.
- The primary symptoms of your skin irritation; i.e is it itchy, red bumps confined to a certain area or is it more spread out and inflamed?
- The primary locations of your skin irritation. If you commonly experience a rash on your elbows or knees, that can be an indicator for atopic dermatitis, which often forms in skin folds.
With this information, your dermatologist will likely be able to differentiate between eczema and contact dermatitis; however, symptoms can overlap, requiring additional testing.
Patch testing is a specialized treatment used when:
- Contact dermatitis is suspected, but the trigger isn’t obvious
- You are suffering from chronic or recurring rashes
- You haven’t seen a decrease in symptoms by avoiding a trigger or with standard treatments
With patch testing, your dermatologist will apply small amounts of potential allergens to your skin for 48–96 hours. If a reaction occurs, it’s a good indication of a trigger you should avoid for the long term to prevent flare-ups and further irritation.
Every season has potential skin irritants, whether it’s the dry winter air or poison oak in your garden in the summer. If you start noticing red, itchy, burning rashes and aren’t sure what’s causing them, visit your dermatologist to see if you could have eczema or an allergy.
The most important next step is identifying the trigger – or triggers – and developing a skincare plan that will improve your skin comfort and skin health.
Schedule an appointment today with a board-certified dermatologist, and enjoy the seasons without the itch!