DO not reopen the wound, that is how you get really bad scars. I have a huge one on my knee, from an athletic director telling me that I needed to get the scab off to get a better scab because it was not healing properly. Well now I have a Keloid scar and it is raised up and huge. It sounds like it could possibly be infected. If it is red around the scab, I would make an appointment with my dr, because it could be infected.