Turns out . . .

. . . it's an infected blister. The heel, I mean. The spider bite's still a spider bite. So even though it hurts like a sonofabitch (kept me awake for most of the night, whimpering like a total nancy and feeling sorry for myself) I can do whatever I want and not worry about furthering an injury. And I got some antibiotics. Oh yeah, did I mention I went to the doctor? Good thing they didn't have to lance it or I'd be eating plain rice for the next 2 weeks. Yeah public option!