Spiders actually tend to avoid human contact. In fact, they only attack when they feel threatened by us. Therefore, the most common situations resulting in bites are when spider webs get severely disturbed or torn down or when the creatures are about to be crushed. For example, they might bite if they are threatened when they get caught in a glove or boot.
Most spiders in Illinois will cause a little bit of pain, a little bit of itching, and some personal distress that a creepy crawly just took a bite. Two species, however, have the potential to cause a few more problems: the Black Widow spider and the Brown Recluse spider.
Usually only found in southern Illinois, Black Widow Spiders usually have a black body with red-markings. They live in yards, fields, woods, and storage areas (like garages and barns). If their webs are destroyed, they will likely try to get away from you just as much as you want to get away from them. Their bite is painful, and within a few hours can cause muscle cramping, twitching and spasm. Serious envenomations are rare in Illinois.
This spider is more common than the Black Widow and is found in dark corners, basements, and storage areas. They bite when we unwittingly interfere with their dwellings. These creatures are difficult to identify since they are just a non-descript brown. The venom can cause swelling and actually destroy the tissue surrounding the bite wound. Other symptoms of a serious bite can include fever, muscle aches and a rash. Brown Recluse Spiders are also usually found in Central and Southern Illinois.
If you get bitten: