australia
spiders
everytime i think of australia and spiders i immediately think of the huntsman spider
Huntsmans are legit like the least threatening spider we have here, I remember one was crawling on my foot while I was playing a game and cbf kicking it off so I just left it there.
There are much, much worse spiders to worry about.
OP it was most likely a spider bite, I know redback bites feel like a burning sensation but the bite is usually very sweating and the area can move around a bit, besides if it was a redback I'm sure you would be feeling much worse.
Really if it is just a burning spot it was probably some bitchy spider, not enough to kill you but enough to be an starfish. You should be fine to just leave it alone but obviously if it's hurting too much or you get any other symptoms it would be best to get it looked at.
Pics would help too.