The bite of the same poisonous spiders may trigger different reactions in separate individuals, since personal sensitivity to the toxins in the venom matters a lot. In geographical areas where poisonous spiders are known to live, people often learn how to differentiate them from the non-toxic species that are frequently encountered around the house. The bite of the brown widow spider is pretty painful, causing a lot of trouble to the victim, yet, it is not even by far as serious or as toxic as that of the black widow. There is a paradox related to the qualities of the brown widow spider venom: when compared to that of the black widow it is twice as potent. When you are able to identify spider species correctly, the risk of getting bitten out of personal negligence is a lot lower; moreover, in case you do get bitten, you can provide valuable information about the species, thus making treatment a lot easier. Many patients are yearly treated for the wrong affection because of the misidentification and misdiagnoses of spider bites. The administration of specific medication can only be done by authorized medical personal and when the circumstances indicate a toxic venom exposure. Contact a health care provider immediately if you've been bitten by a spider and you experience fever, nausea, swelling of the tissues and severe pain. The important thing about spider identification is to actually be able to tell the poisonous spiders from the non-poisonous ones. Fortunately, the latter are far more numerous than the former, as poisonous spiders are spread only in certain globe areas, and sometimes they have warning features that sets them apart. Symptons of a Spider Bite Spider bite symptoms are often variable from one person to another depending on the sensitivity of the individual. Those people who have been the victims of a spider bite often need medical treatment in order to prevent a rapid deterioration of their health condition. Sometimes a spider bite can have very few local marks and it is only identified by the symptoms.