Simon, 32, presents with a 24-hour history of an itchy red weal on the torso.

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Simon, 32, presents with a 24-hour history of an itchy red weal on the torso (pictured). He is otherwise well, with no systemic symptoms.

He went bushwalking on the weekend in a national park in a tick-endemic region on the east coast. Simon has previously sustained a number of tick bites and has usually removed the tick himself with fine tweezers.