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Itching and Swelling
In rare cases, a severe allergic reaction to soy sauce may trigger itching and swelling, particularly around the mouth, lip and tongue where the soy sauce has made contact. The itching may also spread to other parts of the body.
Hives
People allergic to soy sauce may develop hives, which are usually red, itchy and inflamed bumps on the skin. These hives are often accompanied by discomfort and can appear anywhere on the body.
Respiratory Distress
Some individuals allergic to soy sauce may experience difficulty breathing. Symptoms may include shortness of breath, wheezing, and coughing. This symptom should be treated as a medical emergency as it potentially indicates anaphylaxis, which can be life threatening if not treated immediately.
Runny Nose and Watery Eyes
For those allergic to soy sauce, a mild reaction may take the form of a runny nose and watery eyes, similar to symptoms of hay fever. It can be accompanied by sneezing and an itching or burning sensation in the eyes.
Digestive Problems
Digestive problems such as cramping, bloating, nausea and diarrhea may occur in individuals allergic to soy sauce. These symptoms usually arise after eating food containing soy sauce, and can vary in severity.
Numbing Sensation
A rare symptom of soy sauce allergy is a numbing sensation around the mouth area. The numbing might be accompanied by a tingling sensation, both of which typically occur shortly after consumption of soy sauce. This generally indicates a more severe allergic reaction and medical attention should be sought.
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