Having grown up in the woods, I’m so used to tick bites
    that I don’t even notice them half the time. But I
    remember this particular bite because it left an itchy
    welt behind that lasted for weeks after I’d tweezed out
    the tick itself. Long-lasting, itchy welts, I now know,
    are one of the hallmarks of an allergy-causing tick bite.

So this guy went weeks with a tick bite without seeking medical assistance?(!)

Maybe American ticks are different, but I'd always advise people to talk to their GP and get some antibiotics.