A News 9 viewer has a spider bite, and says it is red, painful, and starting to drain. Dr. Lacy Anderson has the warning signs that it could be something more severe. A News 9 viewer has a spider bite ...
Verywell Health on MSN

Causes of pus and how to treat it

Medically reviewed by Jennifer Schwartz, MD Key Takeaways Pus forms when the immune system's white blood cells fight an infection.Pus can be different colors and may emit a foul odor if the infection ...