In some people, a food allergy can trigger a severe allergic reaction called anaphylaxis (a·nuh·fuh·LAK·suhs). This can cause life-threatening symptoms that make it hard to breath.  

Some of the symptoms of anaphylaxis you might see in a baby include: 

• Swelling of the lips, face or tongue 
• Widespread hives over the body 
• Wheezing 
• Repeated coughing 
• Difficulty breathing 
• Swelling of the throat 
• Skin color changing to pale or blue 
• Sudden tiredness or lethargy 
• Seeming limp