Egg allergy symptoms are often similar to what you might experience with any other allergy-a rash, hives, runny nose, or itchy eyes. Like most food allergies, egg allergies can also affect your digestive system. Vomiting, cramping, and an upset stomach are all possible symptoms. In some cases, people may have a very severe reaction to an egg allergy, called anaphylaxis. If you experience symptoms that include a constricted airway, shock, low blood pressure, fast pulse, or vertigo, you may be having an anaphylactic reaction, which requires emergency treatment.