question: i show horses, so i am in the sun a lot for horse shows... i have noticed that i get diarrhea a lot when i am outside in the sun doing things.. i also get head aches all the time from the humidity, and after the diarrhea spells i am very light headed and dizzy when i stand, also very tired whenever i am out in the sun! my question is if the diarrhea would be caused by the sun? and is it possible i am allergic to sun exposure?