Go to the doc and get some antibiotics and it SHOULD be gone within a couple of days. I had a NASTY infected bite on the back of my leg. We aren't sure if it was a spider, a tick, or what. but it had a 2 1/2 inch diameter and was all pusillanimous individual. It was really bad. Got antibiotics and it was completely gone in 3 days (But they have you take them for like 2 weeks so the infection doesn't comeback/you get limes or something)