When some people brush, their gum bleeds profusely. You would think they got punched or something. No, it is because they don’t brush their tongue. It is called Gingivitis and it makes your gum red, swollen, and quick to bleed.
Since your gum is weak and susceptible to bacteria attack because you don’t brush your tongue, it may affect your tooth. You may slowly begin to lose it one after the other. To halt this, try as much as possible to regularly clean your tongue.