I live in spain and i suspect i was bitten by a spider on fri/sat. symtoms seem to match a Brown Recluse Spider bite, commonly found in Valencia area Spain where i am. I didnt notice for some time later when i developed an itchy skin irritation on sat night. i had what looked like a little bit mark surrounded by a red area that has spread bigger and bigger rapidly with tracking line up into my armpit. now the redness has covered most of my arm and the bite area is a hard area. i have been taking antihistamine but the  redness is still spreading. I have now in the last couple of hours developed  a red spotty rash all over my body like measles/heat rash. i have not experienced dizziness or nausea or anything. Do you think the rash is related to the bite? What should i do?
Hi, Thanks for posting in Chat Doctor. From your description, it appears that you have been bitten by spider as you have rightly suspected. The symptoms you are complaining of red spotty rashes is due to allergic reaction. You can do the following