What Causes Urticaria?
Urticaria can be caused by a variety of factors, including allergic reactions, infections, autoimmune disorders, and physical stimuli such as heat, pressure, or exposure to sunlight. Some of the most common causes of urticaria include: (3)
- Allergic reactions to food, medications, or insect bites
- Infections such as viral infections, bacterial infections, or fungal infections
- Autoimmune disorders such as lupus or rheumatoid arthritis
- Exposure to physical stimuli such as heat, cold, pressure, or sunlight
- Stress or emotional upset
- Certain medical conditions such as thyroid disease or cancer