The symptoms of anaphylaxis are severe and develop rapidly.

Symptoms of anaphylaxis include:

• Chest pain
• Difficulty breathing
• Facial swelling
• Fainting
• Low blood pressure
• Mouth or tongue swelling
• Rapid pulse
• Severe hives
• Severe wheezing
• Vomiting

Symptoms of mild allergic reactions develop more slowly and include:

• Hives:
• Rash in children
• Rash in adults
• Eye redness
• Itching
• Nasal congestion
• Runny nose