Kinda looks like new cedar fence posts fly apart too David! Were you wearing a flak jacket when you turned that?
I'd suggest same treatment as beesting allergies... Benadryl, Zantac, and topical steroid ointment on the rash.
Go see a doctor if the symptoms persist!!!
And, quit turning cedar posts!
Aside from that, is it classic progression or, maybe age of the cedar?? Was the stuff you turned a year ago perhaps drier than the posts you turned today? Not disputing your medical evaluation, however I have seen numerous cases of allergic reaction to bee sting caused by other influencing factors.
-- Hangover in one case... Classic, covered in hives, difficulty breathing, swelling of the tongue, in a matter of minutes... to the ER we went! Employee slept 18 hours, went back to work the next day, worked for us 5 years after that, never had another problem.
-- One gal got stung over the eye, wigged slap out because the bee was fluttering in front of her eye; panic caused the reaction. She wasn't wrapped real tight, had never had a problem with swelling, let alone reaction, but she never did come back to work for us. In fact, she made her boys seek employment elsewhere, because she was afraid she might pick up their clothes and find a bee stinger in it and die at home.
-- Had several others over the years... That time of the month, other allergies acting up, freaked out when stung. All went back to work for us, none of them ever had a problem.
-- Ex-brother-in-law had a reaction to deer fly bites around Lake Audubon. Had to rush him to the ER one time. Didn't bother him in the field haying 12 miles away, didn't bother him around any of the other lakes in the area, many of which were fed by the McClusky Canal out of Lake Audubon. Don't know what caused it up there.
In my layman's experience with them, allergic reactions can be and often are a strange thing! They are not always what they appear on the surface David.