What to do for hives?

My son 9 was diagnosed with urticaria today and the hives are taking over his body, he’s more red than skin :sob: he is ok it just looks terrible and I keep crying thinking about how it’s getting worse by the day and I’m being told we just have to “deal” with it that there’s nothing anyone can do for it. Is there anyone who has this or has dealt with this? Does it get better ? Is it always going to happen? Will my baby’s skin get back to normal ? Terrified mammy :weary: