What causes Urticaria / Angioedema?
Causes vary and can include:
- Allergic reactions – to foods, medications, insect stings, or latex
- Physical triggers – pressure, cold, heat, sunlight, or exercise
- Infections – viral, bacterial, or fungal infections
- Medications – antibiotics, NSAIDs, ACE inhibitors, or contrast dyes
- Chronic autoimmune conditions – where the immune system attacks its own tissues
- Idiopathic – in many chronic cases, the exact cause may remain unknown
What are the risk factors?
You may be more likely to develop urticaria or angioedema if you:
- Have a personal or family history of allergies
- Have other atopic conditions such as asthma, eczema, or allergic rhinitis
- Take medications known to trigger hives or swelling
- Are exposed to certain foods, insect bites, or environmental allergens
