I have a question regarding my gums. Two to three months ago, I went to a dentist to get a cavity pulled out, and while he was using the instrument, he accidentally hit my front teeth with full force. It hurt a lot. The sides (where the cavity was) were numb and still hurt. Later, I realized a bruise on my gum had formed. It is just a spot over three teeth on the right front part of my gum. It does not hurt; if it did, the pain is barely noticeable. But by now, I do not know whether it is a bruise. I have had it for way too long.