Contact Dermatitis in Seoul: Find the Trigger, Calm the Rash, Protect Your Skin
Red, itchy or blistering skin where something touched it is usually contact dermatitis — either irritant or allergic. A dermatologist confirms the cause, often with patch testing, and treats the rash quickly.
What is contact dermatitis?
Contact dermatitis is an inflammatory skin reaction caused by something touching the skin — either an irritant that damages the skin barrier (such as detergents) or an allergen that triggers an immune reaction (such as nickel, fragrance or hair dye). Most flares settle within 1–3 weeks once the trigger is avoided and the skin is treated.
Types and triggers
What causes contact dermatitis?
Identifying the exact trigger is the key to stopping repeat flares.
Irritant dermatitis
From soaps, detergents, frequent hand‑washing or chemicals at work.
Allergic dermatitis
A delayed immune reaction to a specific substance.
Cosmetics and fragrance
Common in skincare, perfume and hair products.
Metals
Nickel in jewellery, belts and phone cases.
Hair dye (PPD)
Can cause strong scalp and face reactions; see allergy test.
Plants and medicines
Topical antibiotics, plants and adhesives.
How it works
How we diagnose and treat it
The pattern and location of the rash give strong clues. Patch testing can identify allergens. Treatment combines trigger avoidance, barrier repair and short courses of anti‑inflammatory medicine.
- Day 1: diagnosis and treatment plan
- Days 2–7: itch and redness settle with treatment
- Weeks 1–3: skin barrier recovers
- Long term: avoid identified allergens
What to expect
Your visit, step by step
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History
Dr. Yun reviews products, work, hobbies and timing of the rash.
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Examination
The rash pattern and location are assessed.
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Testing
Patch testing if an allergy is suspected.
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Treatment
Prescription creams, barrier care and, if needed, oral medicine.
When to see a dermatologist
- A rash that keeps coming back in the same place
- Hand dermatitis affecting work
- Reactions after hair dye or new skincare
- Rashes not improving after 1–2 weeks of self‑care
Seek urgent care if
- Swelling of the face, lips or eyes
- Blistering over a large area
- Signs of infection: pain, warmth, pus or fever
- Difficulty breathing (go to emergency)
Contact dermatitis is not contagious.
Compare
Irritant vs. allergic contact dermatitis
Both look similar but need different prevention.
| Irritant | Allergic | |
|---|---|---|
| Cause | Skin damage from a substance | Immune reaction to an allergen |
| Who | Anyone with enough exposure | Only sensitised people |
| Onset | Minutes to hours | 12–72 hours |
| Test | Usually not needed | Patch test |
Your dermatologist
Dr. SangYoul Yun
Chief Director · Korean Board‑Certified Dermatologist · AAD International Fellow (IFAAD)
Dr. Yun focuses on finding the trigger so treatment works long‑term, not just during a flare. Consultations are available in English.
Delight Dermatology Clinic · Registered foreign‑patient medical institution (KHIDI M‑2024‑01‑08‑8248) · 4F, Building B, 509 Gangnam‑daero, Seocho‑gu, Seoul · +82 2‑517‑9991 · About our clinic
FAQ
Contact Dermatitis: frequently asked questions
How long does contact dermatitis last?
Usually 1–3 weeks with treatment and trigger avoidance.
Is it contagious?
No.
Can you test what I am allergic to?
Yes, with patch testing; see allergy test.
Can I be treated on a short trip?
Yes, diagnosis and prescriptions can be done in one visit.
Will steroid creams harm my skin?
Short, correctly prescribed courses are safe and effective.
How is it different from eczema?
Contact dermatitis has an external trigger; atopic eczema is a chronic tendency. See eczema.
Book a contact dermatitis appointment in Gangnam
Send photos of your rash for a same‑day or next‑day appointment.