Understanding Lab Tests for Contact Dermatitis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Contact dermatitis is a skin condition characterized by redness, itching, and inflammation that occurs when the skin comes into contact with an irritating substance or allergen. While contact dermatitis is primarily diagnosed through clinical examination and patient history, blood tests play a valuable supporting role in identifying specific allergens that may be triggering the reactions.
Top Recommended Test
Allergy Evaluation 6, South Central
This comprehensive panel tests for allergic reactions to Bermuda Grass and other regional allergens that can trigger contact dermatitis. When skin comes into contact with these grass allergens, it can result in the characteristic red, itchy rash of contact dermatitis.
2907 reviews
Why Blood Testing is Important for Contact Dermatitis
Although there isn't a single blood test to diagnose contact dermatitis itself, allergy testing is fundamental for determining which specific substances may be causing your skin reactions. By identifying these triggers through blood tests measuring antibody responses, healthcare providers can develop more targeted treatment plans and help patients avoid problematic allergens.
Other Relevant Tests
Respiratory Allergy Panel Region III: GA, northern FL, SC
This regional allergy panel includes testing for rough pigweed, which is known to cause contact dermatitis upon skin contact. The test helps identify if exposure to this plant allergen is responsible for symptoms including skin rash, itching, and blistering.
2907 reviews
Respiratory Allergy Panel Region IV: FL, south of Orlando
This Florida-specific panel tests for rough pigweed allergies, which can cause allergic contact dermatitis. Identifying sensitivity to this allergen helps explain symptoms of itchy, red, and inflamed skin following exposure.
2907 reviews
Allergen Specific IgG Latex (H. braziliensis)
This test measures IgG antibodies to latex proteins. While latex allergies are typically associated with IgE responses, elevated IgG levels may also be found in individuals experiencing contact dermatitis from latex exposure, with symptoms including skin redness, itching, and blistering.
2907 reviews
Respiratory Allergy Profile Region XV: ID (south), NV
This regional panel tests for allergies to mugwort and Russian Thistle, both plants that can cause allergic contact dermatitis in sensitive individuals. Contact with these allergens can lead to skin symptoms including redness, itching, and swelling.
2907 reviews
Understanding Your Results
Positive allergy test results indicate that your immune system has developed antibodies to specific substances, suggesting these may be triggers for your contact dermatitis symptoms. However, test results must be interpreted alongside your clinical symptoms and exposure history for accurate diagnosis and treatment planning.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. Contact dermatitis diagnosis typically involves clinical examination, and blood tests serve as supportive tools for identifying specific allergen triggers.
