Which signs would indicate a spider bite requiring medical evaluation?

• A. Mild itching only
• B. Severe escalating pain, spreading redness or swelling, systemic symptoms such as fever or malaise
• C. Rash confined to the bite with no systemic symptoms
• D. Swelling that remains localized and small

Answer: (B)

Signs that a spider bite needs medical evaluation are red flags that suggest envenomation, infection, or a systemic reaction. When pain becomes severe and keeps escalating, it signals tissue damage or a spreading infection. Redness or swelling that extends beyond the bite area indicates the problem isn’t contained locally and may require treatment to prevent further spread. Systemic symptoms such as fever or a sense of malaise show the body is reacting beyond the local site, which could mean venom effects or a more serious infection. These are the warnings that differentiate a simple local reaction from something that requires medical care.

By contrast, mild itching, a rash confined to the bite with no systemic signs, or swelling that remains small and localized are typically less concerning and often can be managed with basic wound care and monitoring, unless symptoms worsen. If red flags develop or symptoms spread, medical evaluation should be sought.