Understanding Lab Tests for Urticaria
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Urticaria, commonly known as hives, is a skin condition characterized by raised, itchy welts or bumps that appear suddenly on the skin. While urticaria is typically diagnosed through visual examination of the characteristic skin lesions, blood testing plays a crucial role in identifying potential allergic triggers that may be causing the condition.
Top Recommended Test
Respiratory Allergy Panel Region III: GA, northern FL, SC
This regional allergy panel tests for common environmental allergens in the southeastern United States. Exposure to allergens like nettle, which is common in this region, can lead to urticaria causing characteristic hives and skin swelling.
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Why Blood Testing is Important for Urticaria
There is no single blood test to diagnose urticaria itself, as the diagnosis is made based on the appearance of the skin lesions. However, allergy blood testing is fundamental for identifying specific environmental or plant allergens that may be triggering the hives. This information is essential for developing an effective treatment plan and preventing future episodes.
Other Relevant Tests
Respiratory Allergy Panel Region IV: FL, south of Orlando
This panel screens for allergens specific to southern Florida. Contact with regional plants such as nettle can cause urticaria, resulting in the development of itchy, raised welts on the skin that are characteristic of hives.
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Respiratory Allergy Profile Region XVII: CA (northwest), OR (west), WA (west)
This comprehensive allergy profile covers common allergens found in the Pacific Northwest region. Allergic reactions to plants like nettle, which is prevalent in this area, can trigger urticaria or hives, causing itchy bumps or plaques to appear on the skin.
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Hemp Western Water (Acnida tamariscina) IgE
This specific IgE test measures allergic sensitivity to Hemp Western Water, a plant allergen that can trigger urticaria. Elevated IgE levels indicate an allergic reaction that could be causing the hives and skin symptoms associated with urticaria.
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Understanding Your Test Results
Positive results on these allergy tests indicate that your immune system has developed antibodies against specific allergens, which could be triggering your urticaria episodes. Identifying these triggers allows you and your healthcare provider to develop strategies for allergen avoidance and appropriate treatment options.
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 proper diagnosis and treatment of urticaria and allergic conditions.
