What is a common symptom of spider bites?

A common symptom of spider bites is indeed nausea and irregular heartbeat, especially in cases of bites from certain venomous spiders, such as the black widow. These spiders can cause systemic reactions in some individuals, leading to more severe symptoms beyond local effects at the bite site.

In addition to nausea and irregular heartbeat, other systemic symptoms can include muscle cramping and abdominal pain. It's important to recognize these symptoms as signs of a serious reaction that may require medical attention.

While blistering, sharp pain, and swelling can occur with spider bites, they are not universally present and do not typically represent the range of symptoms that might arise from more harmful bites. Recognizing the broader range of symptoms helps in assessing the severity of the bite and determining the appropriate response, especially when treating reactions from potentially dangerous spider species.