The tongue plays a significant role in oral health, as it can harbor bacteria that contribute to various dental and oral problems. The surface of the tongue is covered with tiny papillae, which can trap bacteria, food particles, dead cells, and other debris. If not adequately cleaned, these substances can lead to the growth of bacteria and contribute to bad breath, tooth decay, gum disease, and other oral health issues.

Cleaning your tongue might reduce the amount of bacteria on the tongue, though the impact of reducing the amount of bacteria on the tongue has not been proven, but may improve mouth freshness for smokers.