Dermatology
8 min read
Chronic Urticaria Explained: Hives, Mast Cells, and Allergies
By Dr. Navaneeth K. Unni•Published on 2026-07-01•Patient Group: Adults
Clinical Overview & Pathophysiology
Chronic urticaria is characterized by hives (wheals) that appear regularly for more than six weeks. It is often linked to mast cell hyper-responsiveness and underlying autoimmune activity.
Key Clinical Facts & Indicators
- Recurrent Wheals: Itchy, raised red or skin-colored welts that appear and fade within 24 hours.
- Angioedema: Deep swelling, especially around the lips, eyes, or hands.
- Mast Cell Degranulation: Release of histamine into skin tissue, triggered by stress, heat, or friction.
- Autoimmune Association: Up to 40% of cases are linked to autoantibodies attacking mast cell receptors.
Lifestyle & Nutritional Guidelines
Managing chronic hives requires avoiding known triggers (like NSAIDs, extreme heat, or tight clothing). Incorporate stress management techniques and follow a low-histamine diet during acute flares. Seek a complete allergy evaluation if symptoms persist.
Frequently Asked Questions
Q: Are chronic hives always caused by an allergy?No. Most cases of chronic urticaria are idiopathic or autoimmune in nature, rather than a specific IgE allergy.
Q: Can stress trigger urticaria flare-ups?Yes. Stress releases neuropeptides that can directly trigger mast cell degranulation, causing hives.
✓Medically reviewed by Dr. Navaneeth K. Unni
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