If you've ever had a boil, you know it REALLY hurts.
So by looking at a large, red, swollen area of skin, you can sympathize with that person and say 'yeah, that's gotta hurt, that's gotta be tender'. Most boils are caused by Staph, and MRSA
now is causing more and more of these. If you have a boil that's very painful or expanding - see a doc for treatment.