I had such a bump years ago. It was an infection that was deep inside that eventually spread to my face. I felt it when it just exploded and went from my upper jaw , down to my lower jaw in a line of eruptions that last for years. My face was infected for years. It was something that just would not stop. I did have that tooth extracted but the infection stayed in my face and jaw. I still have remnants of it. It has been about 15 years.