The biochemical named Histamine is one of the foremost reason for the occurrence of Urticaria.
The triggering factors include-
- Foods - Peanuts, eggs, fish and milk
- Medications – Penicillin, aspirin and blood pressure controlling medications
- Insect bites
- Environmental factors – Sunlight, heat and cold water
- Emotional stress
- Certain medical illness – Thyroid, Hepatitis and HIV