What is a Black round scab on your leg with a red inflamed circle around it your lower leg is swollen This has not been itchy at all but when you press it puss comes out any ideas what this could be?

The symptoms you describe, including a black round scab with a red inflamed circle, swelling, and pus, could indicate an infection, such as an abscess or a skin infection like cellulitis. The presence of pus suggests that there may be an accumulation of bacteria in the area. It is important to seek medical attention promptly for proper diagnosis and treatment, as infections can worsen if left untreated.