A friend emailed me this summer as he had been laid low with a headache and cold. He was concerned as he’d been bitten on the leg in France two weeks earlier and wondered if the bite was anything to do with the symptoms. He’d noticed at itch and when he investigated found a tiny bite mark surrounded by a pink halo two-inches across. Since no tick was apparent, he didn't worry until the symptoms of the cold started (lots of phlegm, sore throat then clogged ears, plus a cough).
But then he read that ticks often carry Lyme disease and aren't always detected. He recalled scratching out some kind of white matter from the bite, which seemed unusual. He thought he should go to a hospital emergency department as he thought they might prescribe antibiotics for such potential cases.
The essence of my response was: