Urticaria, also known as hives is a skin reaction that manifests itself as a red, itchy, inflamed rash.
Causes of Urticaria or Hives
Urticaria or Hives are usually caused by an allergic reaction with the following:
The condition can also arise as a result of stress, sharp changes in temperature, physical irritation, as well as chronic viral and bacterial infections.
For most people, an allergy test will determine the cause.