What effect does a black widow spider bite have on the human body?

A black widow spider bite is notable for its potential to cause serious health effects due to the neurotoxic venom it delivers. The venom contains a protein that affects the nervous system, leading to symptoms such as hypertension, which is an increase in blood pressure, muscle spasms, and even paralysis in more severe cases. These symptoms arise from the intense neurotoxic reaction that occurs after a bite, which can lead to significant discomfort and medical complications. This is a clinical concern that differentiates black widow bites from those of many other spiders, which often result in milder reactions.

The other choices reflect symptoms related to various other conditions or insect bites that are not characteristic of the black widow spider's venom effects. Understanding these symptoms is crucial for identifying the seriousness of a black widow bite and determining the appropriate course of treatment or medical attention.