My abdominal region is developing allergic reaction when I do jogging.help please?

Question by Neon Tiger: My abdominal region is developing allergic reaction when I do jogging.help please?
I'm a slim built but I have small fat deposits on my abs. I do crunches and jogging to get rid of it but when I'm starting to sweat on the 5th minute my whole abdominal region is getting very itchy and urticaria occurs. I even try to tale off my shirt thinking it might be caused by constant contact of the textile but still urticaria occurs. Why is this happening? Thanks for your

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