Allergy and Immunology

Missing a dose of your allergy medication can leave you wondering whether to take it immediately, wait for the next scheduled dose, or double up. With desloratadine [...]

If you're taking Xyzal (levocetirizine) for allergies and wondering whether it's safe to enjoy an occasional drink, you're not alone. Many people worry about [...]

Two Very Different Causes, Similar-Looking ResultsRashes are among the most common reasons people seek medical advice, and sun rashes and bacterial skin infections can look [...]

What Is a Sun Allergy?Polymorphic light eruption is the most common form of sun allergy, affecting an estimated 10 to 15 percent of people in temperate climates. It causes [...]

How Spring Allergens Irritate the ThroatSpring brings blooming flowers and warmer weather, but for millions of people, it also brings a scratchy, irritated throat that [...]

Why Spring Brings More Than Just SneezesWhen pollen counts rise each spring, millions of people experience more than itchy eyes and runny noses. The skin often becomes an [...]

What Causes Hives and Why They AppearThose itchy, raised welts that seem to appear out of nowhere can be frustrating and alarming. Hives, medically known as urticaria, occur [...]

When Sunshine Becomes the EnemyMost people welcome warm, sunny days, but for millions of Americans, sun exposure triggers uncomfortable and sometimes painful skin reactions. [...]

Why Spring Allergies Hit So HardAround 64% of US households purchase allergy medications each year, and April alone accounts for roughly 11.3% of annual purchases. That [...]

Why Allergies Feel Like More Than a Runny NoseSeasonal allergies occur when the immune system identifies harmless substances, such as pollen or mold spores, as threats and [...]