Managing urticaria in primary care

Area of Science:

• Dermatology
• Immunology
• Allergy

Background:

• Urticaria presents as transient wheals (hives) with itching or burning, sometimes with angioedema.
• It's classified as acute (≤6 weeks) or chronic (>6 weeks), with chronic urticaria further divided into spontaneous (CSU) and inducible types.
• The condition arises from inflammatory mediators released by mast cells, causing skin changes.

Purpose of the Study:

• To define urticaria, its classifications, and underlying mechanisms.
• To discuss the diagnostic approach and potential associations for chronic urticaria.

Main Methods:

• Review of urticaria characteristics, classification, and pathophysiology.
• Discussion of diagnostic recommendations for chronic urticaria, including blood tests and thyroid function.

Main Results:

• The prognosis for urticaria recovery is generally excellent, though the course is unpredictable.
• The precise cause of urticaria is often unidentifiable; IgE-mediated food allergy is rare in daily CSU.
• Routine tests for CSU include blood counts and inflammatory markers; thyroid function and autoantibodies are also considered due to associations.

Conclusions:

• Urticaria is a mast cell-driven condition with excellent prognosis but unpredictable duration.
• Diagnostic workup for chronic urticaria should be targeted, considering potential autoimmune links like thyroid autoimmunity.