What should you know about uncommon food allergies?

A food allergy is an immune reaction to a food protein. The food may be unusual in your diet, or the reaction may be less familiar, but the body can still respond quickly. Symptoms may include hives, swelling of the lips or face, vomiting, wheezing, or an itchy throat. A reaction can affect more than one body system and may become anaphylaxis, a life-threatening emergency. Food intolerance is different and does not follow the same immune mechanism.

Stop eating the suspected food and keep the packaging or a clear ingredient list. Do not deliberately try the food again at home to confirm the cause. Arrange allergy assessment, particularly if symptoms were rapid, widespread, or involved breathing or faintness. Until reviewed, ask about ingredient checking, cross-contact in shared kitchens, and a written emergency plan. If an adrenaline auto-injector has been prescribed, carry it and learn its instructions; antihistamines do not replace emergency treatment for breathing or circulation symptoms.

Call emergency services immediately for difficulty breathing, throat or tongue swelling, wheezing, collapse, severe dizziness, or symptoms affecting several body systems after eating. Use prescribed emergency medicine according to your plan and do not wait to see whether symptoms settle. A person who is vomiting repeatedly, becoming pale or confused, or rapidly worsening also needs urgent help.

Ask whether the episode fits food allergy or another reaction, which tests are appropriate, how to read ingredient labels, whether close contacts need training, and what your emergency plan should say.