Skipping one brushing session is not a major problem as long as you resume your normal brushing on the following days. 30% of Americans don’t brush their teeth two times a day. And 2% don’t even brush their teeth at all. If you continue not brushing your teeth, you’ll have a buildup of plaque, debris, food debris, calculus around your teeth, which will then lead to bleeding gums, tooth decay, bad breath and several other problems.