the following was taken from
www.spiderbitetreatment.comReactions to the Brown Recluse Spider (BRS) bite depends on the amount of venom injected, age of the spider, an individualās immune system and sensitivity to the venom. Some people experience immediate or delayed effects as the venom kills the tissues (necrosis) at the site of the bite, while other people are unaffected by a bite.
The BRS bite may go unnoticed or feel like a pinprick. It may take 2 to 8 hours to become aware of the bite. Victims may feel a stinging sensation followed by intense pain. Symptoms range from none to general reactions that may include restlessness, generalized itching, fever, chills, nausea, vomiting, or shock. Usually a small white blister initially rises at the bite site surrounded by a swollen area. The affected area enlarges and becomes red, and the tissue is hard to the touch. A lesion from a BRS bite is a dry, blue-gray or blue white, irregular sinking patch with ragged edges and surrounding redness. Lesions can be small, about the size of a dime or larger depending on the reaction of the individual.
Depending on the reaction of the individual to the BRS bite a deep wound can result that is painful and takes a long time to heal. In cases of a severe reaction to the BRS bite, a āvolcano lesionā (a hole in the flesh due to damaged, gangrenous tissue) can erupt at the bite site. The resulting open wound can range in size from a dime to the span of a hand. As the dead tissue gradually sloughs away it exposes underlying tissues. This ulcerating sore may take several weeks to months to heal with scarring resulting.
Many times it is difficult for a physician to accurately diagnose a āBRSā bite, based on the wound characteristics. The spider is needed for positive identification. Wounds that display necrotic tissue damage can result from a variety of causes such as bacteria, viruses, fungi, and other arthropods (centipedes, mites, ticks, wasps, bedbugs, kissing bugs, biting flies, etc.). Misdiagnosis of lesions as brown recluse bites can delay appropriate care