ELI5: Explain Like I'm 5

Exercise-induced anaphylaxis

Exercise-induced anaphylaxis is just like having an allergy, but it only happens after you exercise or do a lot of physical activity. When you exercise, your body gets warmer and your heart beats faster. For some people, this can cause them to have an allergic reaction where their body thinks they are being attacked and releases chemicals called histamines. These histamines can cause things like hives, itching, swelling, and trouble breathing.

It is not clear why some people develop this condition, but some factors that may trigger it include eating certain foods before exercising, taking certain medications, being exposed to certain environmental factors, and having a family history of allergies. People who have this condition may need to avoid certain triggers, take medication to prevent symptoms, and carry an epinephrine auto-injector in case of a severe reaction.

So, remember to pay close attention to how you feel during and after exercising. If you notice any symptoms such as hives or difficulty breathing, speak to your doctor immediately. They can help determine if you have exercise-induced anaphylaxis and provide you with the necessary treatment options.