Hi Phil,
We may be able to allay your fears if indeed you are concerned that this bite will cause you skin necrosis and ruin your good looks.
The white-tail spider's bite does indeed cause unpleasant symptoms as you have said, but it has been declared innocent of the charge of causing ghastly flesh-eating ulcers.
There have certainly been cases where something horrible like this happened to people, and they might have been bitten by something, but wts don't do it to you.
http://www.abc.net.au/health/minutes...es/s933725.htm
http://www.healthfirst.net.au/content/view/112/42/
Cheers