Tests and diagnosis

By Mayo Clinic Staff

Physical exam and medical history

Your doctor will do a physical exam and ask you a number of questions to try to understand what might be causing your symptoms. He or she may also ask you to keep a diary to keep track of:

  • Your activities
  • Any medications, herbal remedies or supplements you take
  • What you eat and drink
  • Where hives appear and how long it takes a welt to fade


It isn't always possible to determine the underlying cause of chronic hives. If the first-choice therapies haven't worked for you, your doctor may order one or more tests, including:

  • Blood tests
  • Allergy tests, though only if your medical history and food diary haven't helped identify the cause of your hives
  • Tests to rule out underlying conditions
July 22, 2016