27 Dec '12, 2am

Q: Am I allergic to running? A:

Q: Am I allergic to running? A:

We used to joke about being allergic to exercise in gym class when we did not like the particular activity for the day. It turns out there really are people who are allergic to exercise, and it can be life-threatening. Exercise can initiate a spectrum of allergic symptoms ranging from a red, irritated skin rash to a life-threatening anaphylactic reaction. The itching and burning in the legs you describe could be symptoms of exercise allergy, especially since it seems so consistent in its onset. There are two “physical allergy” causes of your symptoms that should be considered, exercise-induced anaphylaxis and cholinergic urticaria. Both are mast cell mediated and “treatable,” but exercise-induced anaphylaxis can be fatal, so it is critical to know your correct diagnosis.

Full article: http://www.runnersworld.com/injury-treatment/am-i-allergi...

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