Hives Beginning On Torso Spreading Out Towards Legs And Arms

hives beginning on torso spreading out towards legs and arms then hands and feet, blood work shows nothing viral, no known allergies, blood work shows liver enzymes a little elevated, hives started Wednesday began spreading and got worse day by day, started taking Benadryl Wednesday and steroids Friday , Saturday had a steroid injection and a Benadryl injection due to hives not stopping and burning and itching everywhere and un tolerable