When a person has a gum flap, it is because their gums have pulled away from their teeth. This can happen for a variety of reasons, including:
-brushing too hard
-using a toothbrush with bristles that are too stiff
-gum disease
Once the gum flap has formed, it will not go away on its own. In fact, if it is not treated, the gum flap can get worse and eventually lead to tooth loss.
If you have a gum flap, the best thing to do is to see your dentist right away. They will be able to determine the cause of your gum flap and recommend the best treatment plan for you.