I received a bite on the outside of my calf on my right leg. The bite has turned into a small depression and there is a red area of skin all around the bite (is almost a true circle). The area has become very tender and looks a little swollen. Also, the bite has caused my lower leg to become painful and in the calf muscle and i have trouble walking without limping or placing full weight on my right let. The bite has been there for about 5 days or so, and only became red, tender, etc within the last 3 days

I was wondering if anyone has any ideas what this might be/ what to do?

Cheers

Matt