What Is Dermatitis? Types, Symptoms, and How to Tell Which One You Have
Dermatitis is a broad term that simply means inflammation of the skin. In real life, that inflammation can look like redness, itching, dryness, flaking, soreness, cracking, or weeping patches and it often comes and goes in flares.
The reason dermatitis can feel confusing is that it isn’t one single condition. It’s an umbrella that covers different types, and each type tends to have its own pattern (where it appears, what triggers it, and how it behaves over time).
If you want to see treatment options (including prescription options where appropriate), use the main hub:
✅ Eczema & Dermatitis Treatments
What is dermatitis?
Dermatitis means the skin is inflamed and irritated. That irritation can happen for different reasons, for example:
- your skin barrier is easily disrupted (common in eczema/atopic dermatitis),
- your skin is reacting to irritants (like detergents, soaps, wet work),
- your immune system has developed a delayed allergy to something touching your skin,
- or the dermatitis sits in oily areas (as in seborrhoeic dermatitis).
So the key idea is this:
Dermatitis describes what the skin is doing (inflamed), not always why.
The “type” of dermatitis points to the most likely cause and the best next steps.
Common symptoms across dermatitis types
Most dermatitis types share a core symptom set, even though the triggers and locations can differ:
- Itching (can be mild to intense)
- Redness or darker discoloration (depending on skin tone)
- Dryness and rough texture
- Flaking / scaling
- Burning or stinging (especially after washing or product use)
- Cracks/fissures (often on hands or very dry areas)
- Weeping/oozing in a flare (especially after scratching)
Not everyone gets every symptom. But if you repeatedly see itch + dryness + a flare pattern, dermatitis becomes a strong possibility.
Types of dermatitis (the most common ones)
Contact dermatitis (most common “trigger-based” dermatitis)
Contact dermatitis happens when something on the skin causes irritation or an immune reaction. It usually affects the area of contact most strongly.
There are two main forms:
Irritant contact dermatitis (ICD)
This is caused by damage and irritation, not an allergy. Common irritants include:
- detergents and cleaning products
- frequent handwashing and sanitiser use
- shampoos/soaps/body washes
- wet work (hands repeatedly in water)
- friction (gloves, tools, sports gear)
Typical clues
- often affects hands
- can sting or burn
- can worsen quickly with repeated exposure
- improves when exposure is reduced and the barrier is supported
Allergic contact dermatitis (ACD)
This happens when your immune system becomes sensitised and reacts to a substance. The reaction is often delayed (for example, symptoms appear hours to days after exposure), which makes it hard to identify the trigger.
Common allergy triggers can include:
- fragrance and certain preservatives in skincare
- hair dye chemicals
- metals (e.g., nickel)
- rubber/latex or adhesives (in some people)
Typical clues
- rash appears where a product touched the skin (or where transferred by hands)
- can be very itchy
- can recur after re-exposure, even in small amounts
- may require clinician input if persistent
If contact dermatitis is suspected and keeps returning, clinicians may suggest patch testing to identify allergens
Seborrhoeic dermatitis (scalp + oily-area pattern)
Seborrhoeic dermatitis tends to appear in oilier areas of skin. It often shows up as:
- redness + greasy or dry-looking scale
- flaking (including dandruff on scalp)
Common locations
- scalp
- eyebrows
- sides of the nose and folds around the nose
- behind ears
- upper chest
Typical clues
- distribution is “classic”: scalp/face/chest rather than hands-only
- flaking can be persistent
- symptoms may worsen with stress or seasonal changes
Seborrhoeic dermatitis can overlap with other conditions, so if the face/scalp is repeatedly affected, it’s worth getting a proper assessment.
Atopic dermatitis (eczema)
Atopic dermatitis (commonly called eczema) is a chronic tendency for the skin barrier to be more reactive and inflamed, leading to itchy, dry patches and flares.
If you want the full eczema definition + pattern recognition, read your A1 page:
➡️ (Add internal link here) “What is eczema (atopic dermatitis)? Symptoms & how to recognise it”
Pattern recognition: how to tell which dermatitis type you might have
A useful way to narrow it down is to combine:
- Location, 2) Trigger, 3) Timing
1) Location clues
- Hands/wrists → often contact dermatitis (especially irritant from wet work/cleaners)
- Exact product-contact area (e.g., a new cream, fragrance, hair dye zone) → contact dermatitis likely
- Scalp/eyebrows/sides of nose/chest → seborrhoeic pattern is more likely
- Folds (elbows/knees), neck, recurring dry itchy patches → atopic dermatitis (eczema) becomes more likely
2) Trigger clues
Ask: “What changed right before this started?”
- New soap, shampoo, detergent, hand sanitiser, skincare → contact dermatitis more likely
- Frequent washing, cleaning, wet work → irritant contact dermatitis more likely
- Stress + seasonal changes + oily-area flaking → seborrhoeic pattern is more likely
- No clear trigger but repeated flares and dry/itchy skin → eczema pattern may fit better
3) Timing clues
- Immediate irritation after exposure, especially stinging → irritant contact dermatitis more likely
- Delayed reaction (hours to 1–3 days later) → allergic contact dermatitis is possible
- Chronic pattern with flares over months/years → eczema or ongoing exposure dermatitis
What to do next (practical pathway)
Whatever the type, the early wins usually come from barrier support and trigger control.
Step 1: Barrier-first care
- Use gentle cleanser or soap substitute
- Keep showers short and lukewarm
- Moisturise consistently (especially after washing)
- Avoid fragranced products during flares
Step 2: Reduce exposure to likely triggers
If hands are involved:
- reduce wet work where possible
- wear protective gloves appropriately (and avoid sweating inside)
- rinse and moisturise after cleaning tasks
If face/scalp is involved:
- simplify skincare (avoid multiple actives during a flare)
- consider that a seborrhoeic pattern may need a targeted plan
Step 3: When topical steroids may be used (high level)
In some flares, clinicians may recommend a topical steroid to calm inflammation while you keep moisturising and avoiding triggers.
A common “mild option” entry point (when suitable) is hydrocortisone:
- Hydrocortisone 15g cream
- Hydrocortisone 1% ointment 15g (often preferred when the skin is very dry)
For some cases where a step-up is considered after assessment, options like:
- Eumovate cream 15g
may be used under appropriate guidance.
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✅ Eczema & Dermatitis Treatments
When to seek advice (red flags)
Get prompt medical help if you notice:
- rapidly spreading redness beyond the original rash
- increasing pain, heat, swelling, or tenderness
- pus, worsening yellow crusting, or a bad smell
- fever or feeling unwell
- eye area involvement with pain/swelling
- severe widespread dermatitis or significant sleep disruption
These can be signs of infection or a severe flare that needs a clinician-led plan.
FAQs
Is dermatitis the same as eczema?
Eczema often refers to atopic dermatitis, while dermatitis is the broader umbrella that includes contact dermatitis and seborrhoeic dermatitis, among others.
What causes contact dermatitis?
Either irritants damaging the skin (like detergents/wet work) or a delayed allergy to something touching the skin (like fragrance/preservatives/metals).
How do I tell irritant vs allergic contact dermatitis?
Irritant tends to follow repeated exposure and can sting quickly. Allergic reactions are often delayed (hours to days) and may recur even with small exposures.
What does seborrhoeic dermatitis look like?
Redness with flaking or scaling in oily areas commonly scalp, eyebrows, sides of nose, behind ears, or chest.
Can dermatitis be contagious?
No. Dermatitis itself isn’t contagious.
Should I stop all skincare during a flare?
It’s usually better to simplify, not stop everything. Use gentle cleansing and consistent moisturising, and avoid fragranced or harsh products.
When should I see a clinician?
If it’s severe, recurrent, spreading, infected, involves the eyes/face significantly, or you can’t identify triggers and it keeps returning.