Sorry to hear about your problem. From my vantage point, it is difficult to understand exactly what you may be talking about. In this situation, I can suggest several potential ideas, but ultimately I will need to recommend that you discuss this problem with your doctor
. Some possibilities of what could be happening include that there could be a foreign body that was left behind after the cut. Whether there was some dirt or something similar on the door that was embedded into your leg or if somehow else something else was left in there, this could be what the bump is. Another possibility is just the normal healing process itself, as the inflammation that can happen afterwards causes some extra volume for a short time after the injury
in some cases. This sort of thing will generally calm down with time. There are other options as well, such as deeper injuries and also changes to lymphatic and blood flow due to the injury. As it is hard to know without more information, please speak to your doctor.