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Food allergies are due to an immune system reaction that occurs soon after eating a certain food. They affect about 1 in 20 Americans with cases occurring at any age, but most commonly in babies and y...

If you develop a rash, hives or difficulty breathing after taking certain medications, you may have a drug allergy. While you may not experience allergic symptoms the first time you take a drug, your ...

Severe stinging insect allergy affects over 9.5 million Americans including 3 percent of adults and up to 1 percent of children. There are 40 to 100 deaths in the United States each year, and that num...

Your home, school and workplace contain causes of environmental allergies. These inhaled triggers can include dust, animal dander, feathers, mildew, pollen and mold spores. Other triggers include: ...

In addition to assessing your detailed history about a prior allergic reaction to penicillin, allergists administer skin tests to determine if you are allergic to the medication. These tests, which a...

Medication allergies can be difficult to diagnose. Some allergic reactions to drugs — particularly rashes, hives and asthma — can resemble certain diseases. An allergy to penicillin-type d...

When you are allergic, your body is reacting to a particular substance that should not normally bother you. These substances are called allergens. Typical allergens include pollens, dust mites, animal...

Pregnancy and prenatal care go hand in hand. Learn more about what to expect at your prenatal visits below.  What to expect each trimester First trimester Second trimest...