Hi - hives indicate a compromised immune system. If* you can verify that's what you have, I can give you two excellent suggestions to make them heal faster and help to rebuild your system. I applied oregano oil to mine (ebay seller is wonwithnature-cheap and strong), both directly to the wound (wash hands before and after) and also ingesting 3 drops in 4 oz of water several times a day (at least 5-6x dy).
Second, with your meals take a Good probiotic. You're on antibiotics so take them with every meal, and if possible, with a few bites of yogurt or something healthy just before you go to bed.
Hope this helps.