Contact Dermatitis Testing
View All TestsWhat Is Contact Dermatitis?
Contact dermatitis is an inflammatory skin reaction that occurs when the skin comes into direct contact with a substance that causes irritation or an allergic response. It typically presents as a red, itchy rash at the site of contact, and in some cases may include blistering or dry, flaking skin.
There are two main types: irritant contact dermatitis (caused by direct chemical damage to the skin) and allergic contact dermatitis (an immune-mediated delayed hypersensitivity reaction). Common triggers include nickel in jewellery, fragrances, latex, hair dyes, and preservatives in cosmetics.
While patch testing (performed by dermatologists) remains the gold standard for diagnosing allergic contact dermatitis, blood tests can help identify IgE-mediated sensitivities to certain substances such as latex and nickel. Results should be discussed with your GP or dermatologist.
Common Triggers for Contact Dermatitis
| Trigger Category | Examples | Commonly Found In |
|---|---|---|
| Metals | Nickel, cobalt, chromium | Jewellery, belt buckles, watches |
| Fragrances | Synthetic and natural scents | Perfumes, soaps, detergents |
| Rubber/Latex | Natural rubber latex proteins | Gloves, elastic bands, condoms |
| Preservatives | Formaldehyde, methylisothiazolinone | Cosmetics, cleaning products |
How Testing Works
Choose Your Test
Select from our range of allergy blood tests and book a convenient time at our South Kensington clinic. No GP referral needed.
Nurse Blood Draw
A qualified nurse takes a small blood sample at our clinic. The appointment is quick and straightforward.
Get Your Results
Results are sent directly to you, typically within a few working days. Share them with your GP or specialist to guide your next steps.
Recommended Tests for Contact Allergens
Why Choose a Diagnostic-Only Clinic?
Unlike clinics that provide both testing and treatment, our nurse-led service focuses solely on accurate diagnostic testing. Because we don't offer treatments or prescriptions, there is no commercial incentive to recommend unnecessary tests — just honest, impartial results you can trust.
Nurse-Led & Impartial
Our qualified nurses collect your sample — we don't prescribe, treat, or have any reason to upsell.
Results You Own
Your results are sent directly to you. Take them to your GP or a specialist to discuss what's best for your situation.
You Stay in Control
Understand your allergy profile, then decide with your healthcare professional what steps to take next.
Related Reading
Frequently Asked Questions
Can a blood test diagnose contact dermatitis?
Blood tests can identify IgE-mediated sensitivities to substances such as latex and nickel. However, most allergic contact dermatitis is a delayed (Type IV) reaction best investigated through patch testing performed by a dermatologist. Blood testing may complement this assessment.
How is contact dermatitis different from eczema?
Contact dermatitis is localised to the area of contact with a trigger substance, while eczema tends to appear in characteristic body areas and has a genetic component. The two conditions can coexist.
Do I need a GP referral for allergy testing?
No. You can book directly with our clinic without a GP referral. Simply choose your test and select a convenient appointment time. If you're unsure which test is right for your symptoms, our team can help guide your selection.
Do I need to stop taking antihistamines before a blood test?
No. Unlike skin prick testing, IgE blood tests are not affected by antihistamines or other allergy medications. You can continue taking your regular medications before your appointment.
What should I do with my results?
As a diagnostic-only clinic, we provide results directly to you. We recommend sharing them with your GP or dermatologist for interpretation, and to discuss whether patch testing may also be appropriate.
Investigate Contact Allergen Sensitivities
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