There are several factors that may predispose a young child towards an egg allergy. When their families have a history of allergic rhinitis (hay fever), asthma, hives or eczema, it typically increases the likelihood that a child will develop one or more food allergies. Many types of food allergies, however, including egg allergies, gradually go away as children grow and their digestive and immune systems mature.

When the gases or fumes from eggs are inhaled (for instance, during cooking) allergic rhinitis can result. This kind of reaction typically has symptoms associated with the inhalation of dusts or pollens, which cause the mucous membranes lining the nose to become inflamed. Symptoms associated with this condition include runny nose, stuffy head, nasal congestion and sinus pressure.  

In addition, several related conditions may be mistaken for a food allergy. These include:

• Food intolerances. These conditions usually involve the body’s inability to break down specific food substances (such as egg proteins), rather than an allergic response to the food in question. They are often confused with food allergies because symptoms, causes and treatments may be similar. However, food intolerances are more common and usually less severe.
  
  
• Irritable bowel syndrome. A disorder in which the large intestine (colon) does not function normally, leading to cramping, abdominal pain, bloating, constipation and/or diarrhea. Because specific types of food will sometimes trigger irritable bowel symptoms, this condition may be confused with an egg allergy.
  
  
• Other gastrointestinal conditions. Some kinds of cancers and ulcers of the gastrointestinal tract can produce symptoms similar to those experienced with egg allergies. These symptoms can include vomiting, diarrhea or cramping abdominal pain that gets worse when eating.
  
  
• Food poisoning. A reaction to bacteria, chemicals or other toxins found in contaminated or spoiled foods. Symptoms may be similar to those of an egg allergy.
  
  
• Stress or psychological issues. While the relationship between stress and allergy symptoms is not entirely clear, some individuals will feel sick simply by thinking about a certain type of food.