I had a cold, about a year ago, that gave me hives. I'd never had them before. It was just about the time of year that I have seasonal allergies so I thought it was related to that. Started on just my shins, then added in my forearms, and then my abdomen. After a few days of it I finally went to the doc and he suspected a simple cold. I didn't feel bad other than the itchy hives and I had a cough. The benadryl to manage the hives knocked me out though.