Should I Be Concerned? Did A Spider Bite Cause This?

Some spiders are very poisonous and can even cause a death. I am sure it is not the case with you as it happens very quickly after the bite.  You must be concerned. It is possible that the rashes are because of the bite. Consult with a good skin specialist as early as possible.

It almost sounds as though you've been bitten by a brown recluse spider, in which case it is imperative that you seek professional medical care. The spider bite starts to cause the flesh where the bite occurred to begin to die. This has to be surgically debrided, to stop the cycle of tissue death, and must be treated with oral medication as well as medical treatments. The sooner you get to a Dr.- the sooner he can rule this out or begin to treat. Hope all turns out well for you, God Bless!