Well, it looked like it to me. But based on a phone conversation through the nurseline our insurance company provides, the conclusion reached is that Emperor can be helped through "home care." Warm compresses and baking soda/water compresses every four hours. Taking temperature frequently. Emperor JUST got finished with a round of oral antibiotics from his LAST bug bite. Nurseline recommends using the antibiotic ointment he got then (for a bug bite on his knee) for this bite (on his arm). Put dots around the border of the bite in Sharpie marker. Bandage. Call if it gets worse or he develops a low grade fever.
Watch him carefully.
By the way, the nurse on the line told me, Emperor is SO articulate! She has never heard a child of this age with such a vocabulary, and this polite as well. She is surprised he is homeschooled (um, I distinctly heard Emperor tell her during the interview that she was getting "a bit off topic" when the subject came up) but whatever we are doing with him, we should keep it up. Here's hoping he gets better soon; the child rarely EVER goes outside, but when he does, it seems he swells up somewhere a couple days later.