Extremely Red and Itchy When Exercise Outdoors

Telugammayi87

Everytime I exercise outdoors, for example I walked my dog for 30 minutes about 3.0 mph and it's 91 Degrees outside,I get all red and itchy and my face will even itch and burn sometimes. I'm not new to exercise, I've been exercising consistently the past 2 years. This happens pretty much EVERY time I do any workout outdoors. I went hiking yesterday and miserably itched the entire time. I already take Loratadine (Claritin) every morning. I took 1/2 of a 25mg Benadryl before bed last night just to help a little bit.

Anyone else suffer this? solutions? It's usually only in the summer....