(HealthDay News) — Angioedema is the medical term for hive-like swelling beneath the skin. It’s often caused by an allergic reaction.
The U.S. National Library of Medicine mentions these common triggers for angioedema:
- Outdoor allergens, such as pollen.
- Animal dander.
- Exposure to significant heat, cold, sunlight or water.
- Foods that cause allergies in many people, such as milk, nuts, shellfish or eggs.
- An insect bite or sting.
- Certain medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs), blood pressure drugs, and certain antibiotics such as penicillin.
If someone has difficulty breathing in addition to the swelling, seek emergency medical treatment immediately.