What does serum sickness look like? My stings (I have had a few) get progressively more swollen day by day till about 3-4 days in. Then they bruise like crazy. Doctors all agree that it’s a “bad” reaction (not an allergy and not an infection) and typically put me on prednisone, and advil/aspirin trading off every few hours while applying ice as much as possible.
This is a pic 5 days after a sting on my thigh. The swollen red is about 6-7" in diameter and the purple bruise about 2" in diameter. The doctors all recommend that I find a new hobby, but I carry an epi-pen and have never needed it. 