Urticaria, commonly known as hives, is a skin reaction that causes itchy welts, which can vary in size and appear anywhere on the body.

FAQs:

• What causes Urticaria?
  Allergic reactions, stress, infections, or unknown reasons (idiopathic).

• Is it contagious?
  No, it's not contagious.

• How is it treated?
  Antihistamines are the primary treatment; severe cases may require corticosteroids.