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Symptoms of an Allergic Reaction

Symptoms of an allergic reaction vary depending on the body part affected and the severity of the reaction. Some reactions affect many areas, while others affect just one area. Reactions to the same allergen vary by individual.

Symptoms of an allergic reaction include any, some, or many of the following:

Recommended Related to Allergies

Soothe Your Spring Allergies

In spring, people rush out of doors. They jog. They stroll. They smell the flowers. And ...They sneeze. Sometimes a lot. People with spring allergies know the drill: The itchy, watery eyes, blocked ears, and nasal congestion that can put a crimp in even the sunniest spring day. “A lot of times you don’t sleep well at night,” says Giselle Mosnaim, MD, professor of allergy and immunology at Rush University Medical Center in Chicago. “And if you don’t sleep well at night, you can be tired and irritable...

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Anaphylaxis is serious, potentially life-threatening allergic reaction which is rapid, or sudden, and potentially life-threatening.

One sign of anaphylaxis is shock. Shock has a very specific meaning in medicine: the organs of the body are not getting enough blood because of dangerously low blood pressure. This drop in blood pressure happens when the large blood vessels suddenly expand. If the drop in blood pressure is sudden and drastic, it can lead to unconsciousness, even cardiac arrest and death.

The person in shock may be pale or red, sweaty or dry, confused, anxious, or unconscious.

Breathing may be difficult or noisy, or the person may be unable to breathe.

WebMD Medical Reference

Reviewed by Luqman Seidu, MD on May 18, 2014

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