Jay, I think that was my mistake. I could barely see this “seed tick” and scratched it off with my fingernail. Now the area has a raised bite site and surrounding rash. Probably “vomited” its toxin into the bite. I’m dousing it with iodide twice a day, and also using cortisone cream. So far (since Saturday) no other symptoms.
I grew up in New Jersey (when it was rural) and we had dozens of juvenile dog ticks every day. Played in the woods and fields all summer. Never thought much about it, just pulled them off when we got home (checked our heads, usually). If it itched, we dabbed iodine on the site.
But it seems diseases and their vectors are getting worse.