Understanding Lab Tests for Eczema
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Eczema, also known as atopic dermatitis, is a chronic skin condition characterized by red, itchy, and inflamed patches of skin. While eczema is typically diagnosed through physical examination of the skin, there is no single blood test to diagnose eczema itself. However, blood testing plays a fundamental role in identifying potential triggers and allergens that may worsen eczema symptoms.
Top Recommended Test
Respiratory Allergy Profile Region VIII: IA, IL, MO
This comprehensive allergy panel tests for various environmental allergens common to specific geographic regions, including cockroach allergens. Allergic reactions to these environmental triggers can lead to skin irritation and inflammation, potentially causing or worsening eczema symptoms.
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Why Blood Testing is Important for Eczema Management
Many people with eczema have underlying allergies to foods or environmental factors that can trigger flare-ups. Blood tests measuring specific IgG antibodies can help identify these potential triggers, allowing for better management of the condition through avoidance strategies and targeted treatment approaches.
Other Relevant Tests
Cashew Nut (f202) IgG
This test detects IgG antibodies to cashew nuts, which may indicate a food sensitivity that could trigger eczema flare-ups. In some cases, food allergies like an allergy to cashews can exacerbate symptoms of eczema, making identification of this trigger important for management.
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Beta lactoglobulin (f77) IgG
This test measures IgG antibodies to beta lactoglobulin, a milk protein. Elevated levels can be found in some individuals with eczema, particularly those with a history of food allergies or sensitivities. Identifying this sensitivity can help guide dietary modifications to reduce eczema flare-ups.
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Food Specific IgG Lima Bean
This test detects IgG antibodies to lima beans, which may indicate a food intolerance. In some cases, food intolerances as indicated by elevated IgG levels may contribute to inflammatory responses manifesting as eczema. Identifying and avoiding trigger foods can help manage symptoms.
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Understanding Your Results
These tests help identify potential triggers rather than diagnose eczema itself. Working with a healthcare provider to interpret results and develop an appropriate management plan is essential for effectively controlling eczema symptoms and improving quality of life.
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.
