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Black widow spider bites can cause severe abdominal pain or cramping. Brown recluse spider bites can cause a sting or sharp pain, like a bee sting. With severe bites, surrounding skin may die within a few hours. Both types of spiders generally live in undisturbed areas, such as attics or sheds.
Article Sections. There are more than 30,000 species of spiders, most of which cannot inflict serious bites to humans because of their delicate mouthparts and impotent or prey-specific venoms. However, some spiders produce toxic venoms that can cause skin lesions, systemic illnesses, and neurotoxicity.