The venom from brown recluse spider bites can cause the death or decay of a victim's tissue. This is known as necrosis. After suffering a bite, a person can develop open ulcers that sometimes become quite large. However, it is important to note that not all brown recluse bites result in the formation of these sores.
In fact, sometimes people mistakenly think that a necrotic wound on their skin is the result a brown recluse bite, but they may not actually have been in contact with a brown recluse. These types of lesions are referred to as brown recluse spider cancer.
However, there are other causes of these types of wounds, including certain diseases and the bites of other arthropods or insects. This level of skin irritation can develop from such things as Lyme disease, a staph infection, cancer, or flesh-eating bacteria. Likewise, the bite or sting from a scorpion, bee, or ant can also result in flesh wounds.
If you or someone else observes these kinds of wounds or experiences symptoms similar to those resulting from a brown recluse bite (such as nausea, muscle pain, fever, itching, or convulsions), seek medical attention right away. If possible, take the spider along for identification purposes. Even if these symptoms seem to occur due to something other than a brown recluse bite, it is important to seek immediate medical care. A doctor will make a diagnosis and determine the best course of treatment.