Severe can lead to changes in your bite, or the way your upper and lower come together. Your back teeth can be reduced in size and some teeth can even be lost eventually. can take about three years to become obvious, but not all experience it.
Fun idea: If you don't pick something up after one warning, mom confiscates it and puts it in a "Ransom Rubbage" box. The only way you can get it back is to draw a task from the envelope attached to the box lid. Some tasks are hilarious!