Soy allergies can produce a host of symptoms, which range from the mildly irritating to more serious reactions. Signs and symptoms of soy allergy include:

• Acne or eczema
  
  
• Angioedema (tissue swelling beneath the skin)
  
  
• Rhinitis, including allergic rhinitis
  
  

  

• Itching
  
  
• Nasal congestion
  
  
• Anaphylaxis
  
  
• Asthma
  
  
• Atopic dermatitis
  
  
• Bronchospasm
  
  
• Canker sores (open sores in mouth)
  
  
• Colitis (inflammation of the large intestine)
  
  
• Conjunctivitis
  

  

   
• Diarrhea
  
  
• Shortness of breath
  
  
• Enterocolitis (inflammation of small intestine and colon)
  
  
• Fever
  
  
• Hypotension (low blood pressure)
  
  
• Itching
  
  
• Laryngeal edema (swelling of the tissues in the larynx, or voice box)
  
  
• Hives
  

  

• Nausea and vomiting
  
  
• Wheezing