Hives
Raised, itchy welts on the skin's surface, often red and uncomfortable.
Swelling
Swelling of the face, lips, tongue, or throat, which can cause difficulty in breathing or swallowing.
Difficulty Breathing
Shortness of breath or wheezing caused by constriction of the airways.
Fever
A higher-than-normal body temperature as a response to an allergic reaction.
Tachycardia
Abnormally rapid heart rate due to increased sympathetic activity.
Dizziness
A sensation of lightheadedness or unsteadiness, sometimes leading to fainting.