Diagnosis

A doctor who specializes in skin conditions (dermatologist) might be able to diagnose Sweet's syndrome simply by looking at your skin. But you may need testing before your doctor can make a definite diagnosis. Tests that are useful in assessing people for Sweet's syndrome include:

• Blood tests. A sample of your blood may be sent to a laboratory where it's checked for an unusually large number of white blood cells and certain blood disorders.
• Skin biopsy. Your doctor removes a small piece of affected tissue for examination under a microscope. The tissue is analyzed to determine whether it has the characteristic abnormalities of Sweet's syndrome.