![]() Some people can develop more serious reactions. The discomfort may last only an hour or two or for one or more days. These insects typically cause the most problems when they perceive their nest is threatened.įor most people, a single sting will cause pain, swelling, and stiffness (if the sting was in a joint). Bees and wasps that live in colonies can attack in large numbers, potentially exposing victims to dangerous amounts of venom. This venom usually produces a painful reaction in people. In addition to the saliva, insects and scorpions that sting and spiders that bite often inject venom, which is used to subdue prey or protect themselves. Your body's reaction to the components of the saliva causes the itching, redness, and swelling that is associated with these bites. When insects, mites, and ticks bite, they often inject saliva to digest the tissue and aid in the feeding process.
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