I was bitten on Thursday afternoon on the back of the arm. The bite swelled up a bit an was very red (standard bite!), Friday it was very red and itchy and hot to the touch and had got quite a bit bigger. I ran into my neighbour who suggested drawing a line around it and keeping an eye on whether it gets any bigger. It has! Probably another 1/2 inch all round. It's not quite as red as it was but is still warm to the touch and very itchy. If I put my palm flat over it, it doesn't quite cover the whole thing.
I'm treating it by taking antihistamine and putting on a bite cream with hydrocortisone in it.
Any other suggestions? I have had bites become very big before but this one seems to be going on a bit!