In-depth

Tests and diagnosis

Allergy skin tests

Itching, sneezing and swelling: Find out what's causing your allergy symptoms.

Treatments and drugs

Prednisone risks, benefits

Corticosteroids, such as prednisone and cortisone, are used to successfully treat a variety of conditions. But these medications can also cause unwanted side effects. Get the facts here.

Sep. 17, 2011